Test Pattern Generation Using Boolean Proof Engines

Watch out for some wild weather! Make reading your superpower with DK's beautiful, leveled nonfiction. Use your reading superpowers to learn all about volcanoes from where they start to what happens when they erupt, famous eruptions, how we can learn about them and even make a model of one - a high-quality, fun, non-fiction reader - carefully levelled to help children progress. Eruption! The Story of Volcanoes is a beautifully designed reader all about these dramatic natural features of our world. The engaging text has been carefully levelled using Lexile so that children are set up to succeed. A motivating introduction to using essential non-fiction reading skills. Children will love to find out how volcanoes are formed; the damage - and the good - they do; where the best places are to see an eruption; and how to build their own model volcano.

Learn 100 essential first words with this pack of beautifully illustrated flashcards, perfect for children learning to read and speak Italian. Make learning a new language fun with this pack of 100 beautifully illustrated flash cards. Young learners of Italian will be captivated and engaged by the dynamic, visual approach that sets Italian for Everyone Junior apart from other language materials for children.Italian for Everyone Junior: Flash Cards have been designed for children who are starting to read and speak Italian. Each beautifully illustrated card features an image plus an essential first word, introducing nouns, verbs, and adjectives. On the reverse of the card, just the image is shown so children can test their knowledge.Interactive and engaging, these flash cards for kids include: - A beautifully illustrated pack of 105 flash cards for young children who are learning Italian either as a first or second language. - An essential first word and an illustration on each card, to

Help your child power up their reading skills and learn all about the world's fastest animals with this fun-filled nonfiction reader carefully leveled to help children progress.DK Super Readers Pre-Level: Fast Animals will introduce kids to a parade of speedy animals--from the sprinting cheetah to a shrimp making a speedy catch of its dinner--and is a motivating introduction to using essential nonfiction reading skills, proving ideal for children ready to enter the riveting world of reading. DK Super Readers take children on a journey through the wonderful world of nonfiction: traveling back to the time of dinosaurs, learning more about animals, exploring natural wonders and more, all while developing vital nonfiction reading skills and progressing from first words to reading confidently. The DK Super Readers series can help your child practice reading by: - Covering engaging, motivating, curriculum-aligned topics.- Building knowledge while progressing key Grades Pre-K and K reading sk

A visually stimulating practice book to accompany English for Everyone Junior: Beginner's Course English for Everyone Junior: Beginner's Practice Book is a clearly structured and beautifully illustrated workbook for children ages 6-9, which offers extra practice for those beginning their journey of learning English as a foreign language. Following the same unit-by-unit structure as English for Everyone Junior: Beginner's Course, this workbook provides your child with all the support they need to build their confidence when using the language skills they have learned in the course book. Featuring hundreds of exercises, this practice book tests all the vocabulary and grammar structures taught within English for Everyone Junior: Beginner's Course, making use of a range of both familiar and new exercise mechanisms. Although best used to accompany English for Everyone Junior: Beginner's Course, this practice book can also be used independently by children or teachers who are in need of addi

A fun way to learn about trees from all over the world!Discover the wonderful world of trees This amazing deck of cards welcomes you to the plant kingdom, where you can meet more than 150 species of trees, ranging from the mighty Californian redwood to the ancient banyan tree. Stunning pictures and fast facts enable you to grasp a wealth of knowledge in a fun way. Each card contains snappy and accessible information, displaying each tree in beautiful detail. The front of the card shows the tree with a clue of what it is. The back reveals the answer, plus a dataset about the tree: its size, location, and distinguishing features alongside close-up pictures of the bark, leaves, and fruit. You can use the cards to test your own knowledge; or how about using them to play a guessing game, quiz, or a competitive comparison game with a friend? Our World in Pictures: Trees of the World Flash Cards is packed with information on the world’s most amazing trees―from those that feed us to others th

Discover the wonders of our rocky planet!This amazing deck of cards welcomes you to Earth's extraordinary minerals and gems, from sparkling emeralds to igneous rocks formed deep inside the Earth’s molten core. Stunning pictures and fast facts enable you to grasp a wealth of knowledge in a fun way. Each card contains snappy and accessible information, displaying each rock or mineral in dazzling detail. The front of the card shows the rock with a clue of what it is. The back reveals the answer, plus a dataset of essential information, ensuring you can recognize sedimentary from sandstone, metamorphic from marble, and pyrite from pearl. You’ll discover the unique qualities of each material, together with how it is used in art, industry, architecture, and science. You can use the cards to test your own knowledge, or how about using them to play a guessing game, quiz, or competitive comparison game with a friend? Our World in Pictures: Rocks & Minerals Flash Cards are packed with informat

From small pets to large predators, discover how cats use their whiskers, senses, paws, claws, and more. This essential guide explores common cat characteristics and features iconic members of the cat family – find out why male lions have manes and how stripes on a tiger’s coat help it hunt. Read fascinating myths and legends of cats through history, view cat artifacts from ancient civilizations around the world, and learn how to identify domestic cat breeds as well as how to care for your pet. Eyewitness Cat introduces a much-loved pet alongside its wild family members in the animal kingdom. Using striking full-color photographs and illustrations, discover cat behavior, characteristics, big cats, domestic cat breeds, and much more along with amazing facts, infographics, and statistics to see cats as never before. Part of DK’s best-selling Eyewitness series, which is now getting an exciting makeover, this popular title has been reinvigorated for the next generation of information-seeke

From small pets to large predators, discover how cats use their whiskers, senses, paws, claws, and more.This essential guide explores common cat characteristics and features iconic members of the cat family – find out why male lions have manes and how stripes on a tiger’s coat help it hunt. Read fascinating myths and legends of cats through history, view cat artifacts from ancient civilizations around the world, and learn how to identify domestic cat breeds as well as how to care for your pet.Eyewitness Cat introduces a much-loved pet alongside its wild family members in the animal kingdom. Using striking full-color photographs and illustrations, discover cat behavior, characteristics, big cats, domestic cat breeds, and much more along with amazing facts, infographics, and statistics to see cats as never before.Part of DK’s best-selling Eyewitness series, which is now getting an exciting makeover, this popular title has been reinvigorated for the next generation of information-seekers

About DK Super Readers Level 4 Knights and CastlesUse your reading superpowers to learn all about medieval knights and their castles - a high-quality, fun, non-fiction reader - carefully levelled to help children progress.Knights and Castles is a beautifully designed reader all about these incredible medieval fortresses.The engaging text has been carefully levelled using Lexiles so that children are set up to succeed.A motivating introduction to using essential non-fiction reading skills.Children will love to find out about why castles were built, some of the coolest castles, and medieval people's lives in and around them both in peace and wartime.

Meet the sea creatures living on a coral reef! Make reading your superpower with DK's beautiful, leveled nonfiction. Use your reading superpowers to learn all about a beautiful coral reef and the sea animals living there - a high-quality, fun, nonfiction reader - carefully leveled to help children progress. Fishy Tales is a beautifully designed reader all about the fish and other sea animals living on a coral reef. The engaging text has been carefully leveled using Lexiles so that children are set up to succeed. A motivating introduction to using essential nonfiction reading skills. Children will love to find out about the beautiful coral reef and all the sea animals that can be spotted on it.

A brilliant quiz book for clever kids – put your knowledge about planet Earth to the test and dazzle your family and friends with your brainpower!Can you find the Red Sea, Black Sea, and Yellow Sea on a map? Do you know what makes the Gobi Desert different from the Sahara? No? Then this is the book for you!Earth Knowledge Genius! is packed with more than 60 topics, including the highest mountains, largest deserts, most extreme weather, breathtaking natural wonders, and much more! As you hop from one continent to the next, you will not only learn more about our fascinating world, but will also have fun in this brilliantly entertaining quiz book for kids and the whole family. The pages are packed with eye-popping pictures – but do you know what they show? To help you, “Test Yourself” boxes list what you’re looking for. With three levels of difficulty, the challenge gets harder as you work your way from Starter, to Challenger, and finally the truly tricky Genius category. If you need it,

How did they make that using LEGO® bricks?Find out! Meet the professional builders behind some amazing LEGO® models and learn all about how these creative experts make masterpieces using LEGO bricks.

Discover fascinating facts about communication in all its forms, from around the world and over timeEngaging factual writing introduces young readers to the most interesting aspects of languages, how they evolve and change over time.Humans’ use of language is one of our distinguishing features. Language allows us to communicate what we think, what we want, what we feel, and what we have learned. Some 100,000 years ago, humans began speaking. Since then, we have developed nearly 7000 languages. Languages are living things; they evolve and change over time. They even travel! People carry their language with them and spread it. Large language families even have their own family trees, such as Spanish, French, English. Different languages can be mixed and combined to create new languages with similar words, pronunciation, and grammar rules. Languages can even become extinct if they are not shared and learned by each new generation. Spoken languages are not the only way we communicate. Sign

Help your child power up their reading skills and learn all about mummies and what they are with this engaging nonfiction reader carefully leveled to help children progress. DK Super Readers Level 4: Secrets of the Mummies will introduce kids to mummies from all around the world--including facts about Egyptian, Inca, and Sicilian mummies--and is a motivating introduction to using essential nonfiction reading skills, proving ideal for children ready to enter the riveting world of reading. DK Super Readers take children on a journey through the wonderful world of nonfiction: traveling back to the time of dinosaurs, learning more about animals, exploring natural wonders and more, all while developing vital nonfiction reading skills and progressing from first words to reading confidently. The DK Super Readers series can help your child practice reading by: Covering engaging, motivating, curriculum-aligned topics.Building knowledge while progressing key Grades 4 and 5 reading skills.Develop

Learn 100 essential first words with this pack of beautifully illustrated flashcards, perfect for children learning to read and speak French. Make learning a new language fun with this pack of 100 beautifully illustrated flash cards. Young learners of French will be captivated and engaged by the dynamic, visual approach that sets French for Everyone Junior apart from other language materials for children.French for Everyone Junior: Flash Cards have been designed for children who are starting to read and speak French. Each beautifully illustrated card features an image plus an essential first word, introducing nouns, verbs, and adjectives. On the reverse of the card, just the image is shown so children can test their knowledge.Interactive and engaging, these flash cards for kids include: - A beautifully illustrated pack of 105 flash cards for young children who are learning French either as a first or second language. - An essential first word and an illustration on each card, to help y

Learn vocabulary with 100 flash cards introducing animal words, perfect for children learning English as a first or second language. Make learning new vocabulary fun with this pack of 105 beautifully illustrated flash cards. Young learners of English will be captivated and engaged by the dynamic, visual approach that sets English for Everyone Junior apart from other language materials for children.English for Everyone Junior First Words Animals Flash Cards have been designed for children who are starting to read and speak English. Each beautifully illustrated card features an image plus an essential animal word, and on the reverse of the card, just the image is shown so children can test their knowledge. Interactive and engaging, these animal flash cards for kids include: - 105 beautifully illustrated flash cards for young children who are learning English either as a first or second language.- Essential words covering a range of creatures, from wild animals to farm animals, and sea an

An accessible guide to the most important ideas and developments in the history of architecture, and the people behind themDiscover the key architectural concepts behind the world's most incredible buildings and structures.The Architecture Book goes beyond other architecture books to analyse not just buildings themselves, but the ideas and principles that make each of the featured structures key to the history and evolution of our built environment.From ancient and classical architecture through Medieval, Gothic, and Renaissance buildings, the explosion of Baroque and Rococo, and the 19th-century "battle of the styles", to the emergence of modernism, postmodernism, and the glittering skyscrapers of the 20th and 21st centuries, the book traces the evolution of construction. Using stunning infographics and mind-maps, it shows how architects throughout history have pushed boundaries and created innovative buildings. Examples of architectural movements and styles are drawn from all over th

Visit one of the most incredible natural environments, meeting the Amazon’s plants and wildlife, and its peopleA unique, beautifully illustrated guide to the beauty and diversity of the Amazon – the rainforest and the river, its flora and fauna, and the people who live in the region. Applying the award-winning Eyewitness formula to the subject of the largest and most biodiverse tract of tropical rainforest in the world, and the vast river that winds its way through it, this book profiles everything from the birds, animals, and insects that live there to the nine South American countries it extends across. Part of DK’s best-selling Eyewitness series, which is now getting an exciting makeover, this popular title has been reinvigorated for the next generation of information-seekers and stay-at-home explorers, with a fresh new look, new photographs, updated information, and a new “eyewitness feature – fascinating first-hand accounts from experts in the field.

These Wonders of the World highlight astounding ancient architecture, the history of civilization, and the beauty of our planet.Highlighting more than just the Seven Wonders of the World – the Pyramids of Giza, the Hanging Gardens of Babylon, the Temple of Artemis, the Statue of Zeus, the Mausoleum at Halicarnassus, the Colossus of Rhodes, and the Lighthouse of Alexandria – DK Eyewitness Books: Wonders of the World showcases more than 50 architectural feats and natural treasures. From human-made landmarks such as the Statue of Liberty to record-breaking natural marvels like the River Nile, this book takes kids on an incredible journey around the world's most spectacular sights. Part of DK’s best-selling Eyewitness series, which is now getting an exciting makeover, this popular title has been reinvigorated for the next generation of information-seekers and stay-at-home explorers, with a fresh new look, new photographs, updated information, and a new “eyewitness" feature – fascinating fi

Visit one of the most incredible natural environments, meeting the Amazon’s plants and wildlife, and its peopleA unique, beautifully illustrated guide to the beauty and diversity of the Amazon – the rainforest and the river, its flora and fauna, and the people who live in the region. Applying the award-winning Eyewitness formula to the subject of the largest and most biodiverse tract of tropical rainforest in the world, and the vast river that winds its way through it, this book profiles everything from the birds, animals, and insects that live there to the nine South American countries it extends across. Part of DK’s best-selling Eyewitness series, which is now getting an exciting makeover, this popular title has been reinvigorated for the next generation of information-seekers and stay-at-home explorers, with a fresh new look, new photographs, updated information, and a new “eyewitness feature – fascinating first-hand accounts from experts in the field.

These Wonders of the World highlight astounding ancient architecture, the history of civilization, and the beauty of our planet.Highlighting more than just the Seven Wonders of the World – the Pyramids of Giza, the Hanging Gardens of Babylon, the Temple of Artemis, the Statue of Zeus, the Mausoleum at Halicarnassus, the Colossus of Rhodes, and the Lighthouse of Alexandria – DK Eyewitness Books: Wonders of the World showcases more than 50 architectural feats and natural treasures. From human-made landmarks such as the Statue of Liberty to record-breaking natural marvels like the River Nile, this book takes kids on an incredible journey around the world's most spectacular sights. Part of DK’s best-selling Eyewitness series, which is now getting an exciting makeover, this popular title has been reinvigorated for the next generation of information-seekers and stay-at-home explorers, with a fresh new look, new photographs, updated information, and a new “eyewitness" feature – fascinating fi

North and South enter a conflict of more than 50 battles – discover how tensions exploded into a war that lasted four years.This book takes you through the history of one of the most important times inUS history. Find out how Abraham Lincoln became president in 1860 and why hewas assassinated. Discover the horror of enslaved life, and about the Underground Railroad that helped its victims escape. Eyewitness American Civil War shows both sides of the conflict in an equal light, allowing readers to consider all views. This museum-in-a-book uses striking full-color photographs of paintings, artifacts, and illustrations of battles, famous leaders, and much more along with amazing facts, infographics, statistics, and timelines to reveal this period of US history as never before. Part of DK’s best-selling Eyewitness series, which is now getting an exciting makeover, this popular title has been reinvigorated for the next generation of information-seekers and stay-at-home explorers, with a fre

Dive into a watery world where many wonderful fish of all shapes and sizes swim, in rivers, lakes, and oceans.DK Eyewitness Books: Fish is an exciting and informative guide to the fascinating world of fish. Striking color photographs of tropical fish, eels, seahorses, and more offer a unique "eyewitness" view of the natural history of fish, how they behave, and how they survive. See the lethal jaws of a piranha, a porcupine fish "puffing up," how a dogfish swims, growth rings on a fish scale, what a fish looked like 400 million years ago, and a fish with legs. Learn how a school stays together, why some fish swim upside down, how a stingray stings, why fish need water to breathe, and much more. Part of DK’s best-selling Eyewitness series, which is now getting an exciting makeover, this popular title has been reinvigorated for the next generation of information-seekers and stay-at-home explorers, with a fresh new look, new photographs, updated information, and a new “eyewitness feature

North and South enter a conflict of more than 50 battles – discover how tensions exploded into a war that lasted four years.This book takes you through the history of one of the most important times inUS history. Find out how Abraham Lincoln became president in 1860 and why hewas assassinated. Discover the horror of enslaved life, and about the Underground Railroad that helped its victims escape. Eyewitness American Civil War shows both sides of the conflict in an equal light, allowing readers to consider all views. This museum-in-a-book uses striking full-color photographs of paintings, artifacts, and illustrations of battles, famous leaders, and much more along with amazing facts, infographics, statistics, and timelines to reveal this period of US history as never before. Part of DK’s best-selling Eyewitness series, which is now getting an exciting makeover, this popular title has been reinvigorated for the next generation of information-seekers and stay-at-home explorers, with a fre

Dive into a watery world where many wonderful fish of all shapes and sizes swim, in rivers, lakes, and oceans.DK Eyewitness Books: Fish is an exciting and informative guide to the fascinating world of fish. Striking color photographs of tropical fish, eels, seahorses, and more offer a unique "eyewitness" view of the natural history of fish, how they behave, and how they survive. See the lethal jaws of a piranha, a porcupine fish "puffing up," how a dogfish swims, growth rings on a fish scale, what a fish looked like 400 million years ago, and a fish with legs. Learn how a school stays together, why some fish swim upside down, how a stingray stings, why fish need water to breathe, and much more. Part of DK’s best-selling Eyewitness series, which is now getting an exciting makeover, this popular title has been reinvigorated for the next generation of information-seekers and stay-at-home explorers, with a fresh new look, new photographs, updated information, and a new “eyewitness feature

Teach your young children all there is to know about the minerals and rocks found beneath their feet with this delightful set of 54 flash cards.Dig up the Earth and uncover the wonderful world of rocks and minerals with this collection of colorful, educational picture cards. From rough rocks to glistening gems and everything in between, children will love mastering the names of these elements and learning all of the must-know facts and figures―there will be no stone left unturned. These two-sided cards will provide simple questions that will challenge children’s understanding, fascinating facts that will test their memory, and a pronunciation guide for each rock and mineral to help children develop their vocabulary and reading abilities. The flash cards are also large and sturdy, making them ideal for any learning environment and perfect for messy little hands. With a vibrant, detailed illustration on every card, the Rocks and Minerals Flash Cards set makes for a beautiful gift and mo

Ideal for home learning, this simple and inspirational book has everything you need to grasp grammar and punctuation, and master essential reading and writing skills.Need help telling your adjectives from your adverbs? Struggling to figure out what that poem is really about, or where to begin with your essay?Using short, straightforward explanations and clear graphics to shed light on the trickiest of topics, this is the perfect guide to understanding and using the English language. Illustrated examples make daunting grammar accessible and fun, and help develop an understanding that can be applied to school studies. Annotated texts complement concise, practical guidance to support students in developing sound analytical and writing skills. The carefully selected reading recommendations will inspire reading for pleasure, while clear links between topics will ensure that students not only understand language techniques but know how to apply them effectively.How to Be Good at Language Art

Ideal for home learning, this simple and inspirational book has everything you need to get to grips with grammar and punctuation, and master essential reading and writing skills.Need help telling your adjectives from your adverbs? Struggling to work out what that poem is really about, or where to begin with your essay? Using short, straightforward explanations and clear graphics to shed light on the trickiest of topics, this is the perfect guide to understanding and using the English language.Illustrated examples make daunting grammar accessible and fun, and help develop an understanding that can be applied to school studies. Annotated texts complement concise, practical guidance to support students in developing sound analytical and writing skills. The carefully selected reading recommendations will inspire reading for pleasure, while clear links between topics will ensure that students not only understand language techniques but know how to apply them effectively.How to be Good at En

Learn and memorize Earth’s building blocksHave you ever looked at the Periodic Table and wondered whether you’ll ever be able to learn all the major elements? Well you can, and it’s never been easier with DK’s Periodic Table flash cards. Each colorful card can be used as a quick card and includes a photo of the element in its raw state or in use, and all the facts you need to memorize, such as atomic number and chemical properties.Whether you’re studying for tests or just want to expand your knowledge of science, these flash cards are the handy aids you need to learn just about everything you need to know about Dmitri Mendeleev’s groundbreaking Periodic Table. Included is a leaflet showing the whole Periodic Table and how to read it, plus lots of ideas for games to play. Whether you just want to have fun, test your friends, or master one of science’s most iconic charts, with these cards you’ll be in your element!

Make learning new vocabulary fun with these beautifully illustrated flash cards. Introducing 100 essential first words these cards are perfect for children beginning to learn English as a first or second language.English for Everyone Junior: My First Words Flash Cards have been designed for children who are starting to read and speak English. Each beautifully illustrated card features an essential first word and an image on one side. On the reverse, just the image is shown so children can test their knowledge.Five additional cards are packed with suggestions for educational games and activities. Simple to use and fun, these flash cards are made of sturdy laminated cardboard and are suitable for young hands to play with again and again.

Discover how the migration of peoples has shaped the modern world.This beautifully illustrated book details the movement of people and cultures around the world – from the early migrations of Homo erectus out of Africa 50,000 years ago to modern refugee movements and migrations. Through vibrant photographs, illustrations, and maps, Migrations explores famous (and infamous) movements in history, from the Middle Passage and Trail of Tears to the California Gold Rush, the Italian diaspora, and the Windrush generation. While many traditional world histories focus on (mainly European) “exploration” and “discovery,” Migrations explores the story of each continent and focuses on cultures rather than conquest. Migrations highlights the human story and the positives: what has survived, not just what was destroyed. Migrations is a history book with a fresh perspective, focusing on a topic ever more relevant in the modern world: Where did we come from? And what brought us here?

What would Harry do?Famously charming, fabulously dressed, and unapologetically himself―there are so many reasons to want to be more Harry Styles. This book will show you how to channel this once-in-a-generation pop icon.Following his stratospheric levels of fame as a member of One Direction, Harry has carved out his own unique path in the industry as a solo artist, actor, and fashion icon. Harry’s approach to life, career, music, relationships, and style is inspirational to anyone who wants to subvert expectations, be authentically themselves, and treat people with kindnessBe More Harry Styles is the perfect gift for Harry Styles fans.

Become an expert on all types of weather and how and why they happen.Why does it rain? How hot is a bolt of lightning? What makes hurricanes form, and how does climate change affect the weather? What happens when a cold front rolls in? Become a meteorology expert and set up your own home weather station, and learn to read nature’s own signs of changing weather. Eyewitness Weather shows you what weather looks like, from a tropical storm cloud seen from above to close-ups of snowflake crystals. Learn about what weather scientists do, why weather works differently on the coast and inland, and much more along with amazing facts, infographics, statistics, and timelines to reveal this civilization’s secrets as never before.Part of DK’s best-selling Eyewitness series, which is now getting an exciting makeover, this popular title has been reinvigorated for the next generation of information-seekers and stay-at-home explorers, with a fresh new look, new photographs, updated information, and a n

Become an expert on all types of weather and how and why they happen. Why does it rain? How hot is a bolt of lightning? What makes hurricanes form, and how does climate change affect the weather? What happens when a cold front rolls in? Become a meteorology expert and set up your own home weather station, and learn to read nature’s own signs of changing weather. Eyewitness Weather shows you what weather looks like, from a tropical storm cloud seen from above to close-ups of snowflake crystals. Learn about what weather scientists do, why weather works differently on the coast and inland, and much more along with amazing facts, infographics, statistics, and timelines to reveal this civilization’s secrets as never before. Part of DK’s best-selling Eyewitness series, which is now getting an exciting makeover, this popular title has been reinvigorated for the next generation of information-seekers and stay-at-home explorers, with a fresh new look, new photographs, updated information, and

Start learning English as a second language with this visually stimulating practice book for children ages 6-9. Accompanying the English for Everyone Junior: Beginner's Course, this beautifully illustrated workbook features an abundance of vocabulary and grammar exercises for children learning English as a foreign language. When it comes to languages, practice really does make perfect! This work book guides young linguistic learners through exercises and activities to consolidate what they've learnt and build confidence in their skills.Making use of a range of both familiar and new exercise mechanisms, this practice book is an invaluable research tool to test the vocabulary and grammar structures taught in the course book. Immerse yourself in this practical ESL learning material, which includes: -Over 1,000 vocabulary and grammar exercises -Lay-flat binding, making the book easier to write in -Extensive accompanying audio resources that can be accessed via the website and the app -The

Start learning English as a second language with this visually stimulating practice book for children ages 6-9. Accompanying the English for Everyone Junior: Beginner's Course, this beautifully illustrated workbook features an abundance of vocabulary and grammar exercises for children learning English as a foreign language. When it comes to languages, practice really does make perfect! This work book guides young linguistic learners through exercises and activities to consolidate what they've learnt and build confidence in their skills.Making use of a range of both familiar and new exercise mechanisms, this practice book is an invaluable research tool to test the vocabulary and grammar structures taught in the course book. Immerse yourself in this practical ESL learning material, which includes: -Over 1,000 vocabulary and grammar exercises -Lay-flat binding, making the book easier to write in -Extensive accompanying audio resources that can be accessed via the website and the app -The

Learn how NOT to believe what you see with this book of eye-popping pop-up visual tricks. From the classic "which dot is bigger?" or "is this line straight?" illusions to the first-ever 3D trick to appear in a book, Optical Illusions is packed with picture puzzles. Every illusion is set up to challenge what you think you see.There are hints and tips of how to approach the illusion, and then an explanation of how it works and why you were fooled (and you will be!). There are also flaps, tabs, and a decoder to test the answers, so you can check whether different-looking colours are actually the same, or if those lines really are wonky. All kinds of visual tricks are featured, including distortion, motion, colour and brightness, ambiguous illusions, impossible objects, hidden images...but the stars of the show are two large interactive illusions - the "thaumatrope" spinner that puts a bird in a cage, and a 3D perspective sculpture. Even though you will build it yourself and know which bit