Linear Programming and Algorithms for Communication Networks

Top Reading SeriesTop Reading is a six-level reading program that helps young English learners build confidence, fluency, and essential reading skills. Through short, engaging passages and age-appropriate topics, students develop vocabulary, comprehension, and a positive reading habit. Designed for EFL/ESL environments, the series supports steady language growth from beginner to low-intermediate levels (CEFR Pre-A1 to A2+).FeaturesClear six-level progression (Levels 1–6)Structured leveling supports steady growth from CEFR Pre-A1 to A2+.Leveled reading passages (30–210 words)Appropriate text lengths help learners build confidence and reading fluency.Fiction and non-fiction exposure across the seriesLevels 1–3 offer a mix of narrative and informational texts, while Levels 4–6 focus primarily on non-fiction topics in science, history, health, and social studies.Reading skill development (leveled)Students acquire reading abilities progressively across levels.Levels 1–2 build foundationa

Book DetailsReading Gate 30 is a three-book beginner series designed to provide guided reading practice. The series uses interesting, carefully written fiction and non-fiction texts that allow students to take their first steps into reading. Each unit features a two-page illustrated passage with useful, high-frequency vocabulary and simple sentence patterns. Students will develop their vocabulary, syntax, reading fluency, and reading comprehension as they progress through the series. Reading Gate 30 fosters a love for reading while using a supportive, easy-to-understand format.FeaturesSimple stories and engaging texts developed around fun, kid-friendly reading topicsColorful, captivating illustrations and photographs to aid in understandingHigh-frequency words and review words to promote reading competencyInteractive and enjoyable picture dictionariesReading comprehension activities to build language proficiencyPractical exercises to increase vocabulary, grammar, and sentence exposure

Book DetailsReading Gate 30 is a three-book beginner series designed to provide guided reading practice. The series uses interesting, carefully written fiction and non-fiction texts that allow students to take their first steps into reading. Each unit features a two-page illustrated passage with useful, high-frequency vocabulary and simple sentence patterns. Students will develop their vocabulary, syntax, reading fluency, and reading comprehension as they progress through the series. Reading Gate 30 fosters a love for reading while using a supportive, easy-to-understand format.FeaturesSimple stories and engaging texts developed around fun, kid-friendly reading topicsColorful, captivating illustrations and photographs to aid in understandingHigh-frequency words and review words to promote reading competencyInteractive and enjoyable picture dictionariesReading comprehension activities to build language proficiencyPractical exercises to increase vocabulary, grammar, and sentence exposure

Book DetailsReading Gate 100 is a three-book series designed to provide guided reading practice for high-beginning-level to pre-intermediate-level readers. The series uses a rich collection of carefully written fiction and non-fiction texts with high-frequency vocabulary and useful sentence patterns. As students progress through the series, they will develop their vocabulary, syntax, reading fluency, and reading comprehension. Reading Gate 102 offers the right balance of challenge and support to help readers grow and move towards fluency.FeaturesInteresting topics and engaging texts to help students stay immersedColorful, captivating photographs to aid in understandingHigh-frequency words and review words to promote reading competencyInteractive and enjoyable picture dictionariesReading comprehension activities to build language proficiencyPractical exercises to increase vocabulary, grammar, and sentence exposure while expanding reading abilitiesFull-color workbook

Book DetailsReading Gate 100 is a three-book series designed to provide guided reading practice for high-beginning-level to pre-intermediate-level readers. The series uses a rich collection of carefully written fiction and non-fiction texts with high-frequency vocabulary and useful sentence patterns. As students progress through the series, they will develop their vocabulary, syntax, reading fluency, and reading comprehension. Reading Gate 101 offers the right balance of challenge and support to help readers grow and move towards fluency.FeaturesInteresting topics and engaging texts to help students stay immersedColorful, captivating photographs to aid in understandingHigh-frequency words and review words to promote reading competencyInteractive and enjoyable picture dictionariesReading comprehension activities to build language proficiencyPractical exercises to increase vocabulary, grammar, and sentence exposure while expanding reading abilitiesFull-color workbook

Book DetailsReading Gate 100 is a three-book series designed to provide guided reading practice for high-beginning-level to pre-intermediate-level readers. The series uses a rich collection of carefully written fiction and non-fiction texts with high-frequency vocabulary and useful sentence patterns. As students progress through the series, they will develop their vocabulary, syntax, reading fluency, and reading comprehension. Reading Gate 100 offers the right balance of challenge and support to help readers grow and move towards fluency.FeaturesInteresting topics and engaging texts to help students stay immersedColorful, captivating photographs to aid in understandingHigh-frequency words and review words to promote reading competencyInteractive and enjoyable picture dictionariesReading comprehension activities to build language proficiencyPractical exercises to increase vocabulary, grammar, and sentence exposure while expanding reading abilitiesFull-color workbook

Book DetailsReading Gate 50 is a three-book high-beginner series designed to provide guided reading practice. The series uses interesting, carefully written fiction and non-fiction texts that take students from the learning-to read stage into the reading-to-learn stage. Each unit features a two-page illustrated passage with useful, high-frequency vocabulary and simple sentence patterns. Through this series, students will develop their vocabulary, syntax, reading fluency, and reading comprehension. Reading Gate 50 fosters a love for reading while using a supportive, easy-to-understand format.FeaturesGraded fiction and non-fiction reading passages focusing on kid-friendly topicsColorful, captivating illustrations and photographs to aid in understandingHigh-frequency words and review words to promote reading competencySimple pre-reading activities to stimulate interest and background knowledgePractical exercises to increase vocabulary, grammar, and sentence exposure while expanding readin

Book DetailsReading Gate 30 is a three-book beginner series designed to provide guided reading practice. The series uses interesting, carefully written fiction and non-fiction texts that allow students to take their first steps into reading. Each unit features a two-page illustrated passage with useful, high-frequency vocabulary and simple sentence patterns. Students will develop their vocabulary, syntax, reading fluency, and reading comprehension as they progress through the series. Reading Gate 30 fosters a love for reading while using a supportive, easy-to-understand format.FeaturesSimple stories and engaging texts developed around fun, kid-friendly reading topicsColorful, captivating illustrations and photographs to aid in understandingHigh-frequency words and review words to promote reading competencyInteractive and enjoyable picture dictionariesReading comprehension activities to build language proficiencyPractical exercises to increase vocabulary, grammar, and sentence exposure

Book DetailsReading Gate 50 is a three-book high-beginner series designed to provide guided reading practice. The series uses interesting, carefully written fiction and non-fiction texts that take students from the learning-to read stage into the reading-to-learn stage. Each unit features a two-page illustrated passage with useful, high-frequency vocabulary and simple sentence patterns. Through this series, students will develop their vocabulary, syntax, reading fluency, and reading comprehension. Reading Gate 50 fosters a love for reading while using a supportive, easy-to-understand format.FeaturesGraded fiction and non-fiction reading passages focusing on kid-friendly topicsColorful, captivating illustrations and photographs to aid in understandingHigh-frequency words and review words to promote reading competencySimple pre-reading activities to stimulate interest and background knowledgePractical exercises to increase vocabulary, grammar, and sentence exposure while expanding readin

Book DetailsReading Gate 50 is a three-book high-beginner series designed to provide guided reading practice. The series uses interesting, carefully written fiction and non-fiction texts that take students from the learning-to read stage into the reading-to-learn stage. Each unit features a two-page illustrated passage with useful, high-frequency vocabulary and simple sentence patterns. Through this series, students will develop their vocabulary, syntax, reading fluency, and reading comprehension. Reading Gate 50 fosters a love for reading while using a supportive, easy-to-understand format.FeaturesGraded fiction and non-fiction reading passages focusing on kid-friendly topicsColorful, captivating illustrations and photographs to aid in understandingHigh-frequency words and review words to promote reading competencySimple pre-reading activities to stimulate interest and background knowledgePractical exercises to increase vocabulary, grammar, and sentence exposure while expanding readin

Description 1200 Key English Words is a three-book series designed to provide a solid foundation in vocabulary for a wide age range of beginners. The words chosen for the series come from an analysis

Description 1200 Key English Words is a three-book series designed to provide a solid foundation in vocabulary for a wide age range of beginners. The words chosen for the series come from an analysis

Description 1200 Key English Words is a three-book series designed to provide a solid foundation in vocabulary for a wide age range of beginners. The words chosen for the series come from an analysis

DescriptionReading for the Academic World is a three-book series designed for students who are seeking to develop their academic reading skills with particular focus on passages that incorporate vocab

DescriptionReading for the Academic World is a three-book series designed for students who are seeking to develop their academic reading skills with particular focus on passages that incorporate vocab

DescriptionTop Phonics Readers is a 5-book series developed for young learners who are already familiar with the English alphabet. Top Phonics Readers can be used as a stand-alone reading series, or a

DescriptionTop Phonics Readers is a 5-book series developed for young learners who are already familiar with the English alphabet. Top Phonics Readers can be used as a stand-alone reading series, or a

DescriptionTop Phonics Readers is a 5-book series developed for young learners who are already familiar with the English alphabet. Top Phonics Readers can be used as a stand-alone reading series, or a

DescriptionTop Phonics Readers is a 5-book series developed for young learners who are already familiar with the English alphabet. Top Phonics Readers can be used as a stand-alone reading series, or a

DescriptionTimed Reading for Fluency is a useful series for students who want to develop their reading fluency. Because fluency development requires students to make the best use of what they already

DescriptionTimed Reading for Fluency is a useful series for students who want to develop their reading fluency. Because fluency development requires students to make the best use of what they already

DescriptionTimed Reading for Fluency is a useful series for students who want to develop their reading fluency. Because fluency development requires students to make the best use of what they already

DescriptionTimed Reading for Fluency is a useful series for students who want to develop their reading fluency. Because fluency development requires students to make the best use of what they already

DescriptionFun Reading is a three-level series designed for elementary students of English who are moving from the learning-to-read stage into the reading-to-learn stage. Fun Reading incorporates shor

DescriptionFun Reading is a three-level series designed for elementary students of English who are moving from the learning-to-read stage into the reading-to-learn stage. Fun Reading incorporates shor

DescriptionStudy phonics with Top Phonics.Top Phonics is on easy-to-use five-Level phonics series developed for young learners of English. Starting in Top Phonics Book 1. students will learn to recogn

DescriptionStudy phonics with Top Phonics.Top Phonics is on easy-to-use five-Level phonics series developed for young learners of English. Starting in Top Phonics Book 1. students will learn to recogn

DescriptionStudy phonics with Top Phonics.Top Phonics is on easy-to-use five-Level phonics series developed for young learners of English. Starting in Top Phonics Book 1. students will learn to recogn

DescriptionSpeaking for Speeches: Skills for Presentations is an interactive, accessible three-level series specifically designed to develop the public speaking skills of English language learners at

DescriptionStudy phonics with Top Phonics.Top Phonics is on easy-to-use five-Level phonics series developed for young learners of English. Starting in Top Phonics Book 1. students will learn to recogn

DescriptionStudy phonics with Top Phonics.Top Phonics is on easy-to-use five-Level phonics series developed for young learners of English. Starting in Top Phonics Book 1. students will learn to recogn

Smart Writers is a three-book series designed to develop the writing skills of English language learners at the low intermediate level of English (CEFR A2). Throughout the series, students learn how to organize their thoughts, explore a variety of writing topics within each unit's theme, and practice paragraph development. The series also reinforces students' understanding of useful grammatical structures through activities modeling writing ideas related to each unit's theme. Students who complete this series will develop stronger writing skills and gain confidence in their ability to compose paragraphs and essays related to personal experiences or opinions.FeaturesWide variety of engaging writing topics including school, daily life, hobbies and interests, hopes for the future, giving advice, etc.Practical exercises and activities allowing students to organize and prepare their own passagesMultiple sample passages providing ideas to spark students' creative thinkingGraphic organizers t

Smart Writers is a three-book series designed to develop the writing skills of English language learners at the low intermediate level of English (CEFR A2). Throughout the series, students learn how to organize their thoughts, explore a variety of writing topics within each unit's theme, and practice paragraph development. The series also reinforces students' understanding of useful grammatical structures through activities modeling writing ideas related to each unit's theme. Students who complete this series will develop stronger writing skills and gain confidence in their ability to compose paragraphs and essays related to personal experiences or opinions.FeaturesWide variety of engaging writing topics including school, daily life, hobbies and interests, hopes for the future, giving advice, etc.Practical exercises and activities allowing students to organize and prepare their own passagesMultiple sample passages providing ideas to spark students' creative thinkingGraphic organizers t

Easy First Reading is a three-level introductory series designed to teach students how to read. The series uses an engaging step-by-step approach to build the reading skills of English language learners through practice of phonetic decoding and high-frequency word reading. Each unit features two illustrated passages with useful, carefully graded vocabulary and simple sentence patterns. These books were written and designed to motivate language learners to enjoy English language reading from the very beginning. Students who complete this series will achieve a strong reading foundation?setting them up for fluency and success in reading, listening, speaking, writing, and pronunciation.FeaturesTwo original reading passages per unit developed around fun, kid-friendly reading topicsColorful, captivating illustrations to aid in understandingHigh-frequency words and review words to promote reading competencyIllustrated, simple, kid-friendly vocabularyReading comprehension activities to build l

Easy First Reading is a three-level introductory series designed to teach students how to read. The series uses an engaging step-by-step approach to build the reading skills of English language learners through practice of phonetic decoding and high-frequency word reading. Each unit features two illustrated passages with useful, carefully graded vocabulary and simple sentence patterns. These books were written and designed to motivate language learners to enjoy English language reading from the very beginning. Students who complete this series will achieve a strong reading foundation?setting them up for fluency and success in reading, listening, speaking, writing, and pronunciation.FeaturesTwo original reading passages per unit developed around fun, kid-friendly reading topicsColorful, captivating illustrations to aid in understandingHigh-frequency words and review words to promote reading competencyIllustrated, simple, kid-friendly vocabularyReading comprehension activities to build l

Smart Writers is a three-book series designed to develop the writing skills of English language learners at the low intermediate level of English (CEFR A2). Throughout the series, students learn how to organize their thoughts, explore a variety of writing topics within each unit's theme, and practice paragraph development. The series also reinforces students' understanding of useful grammatical structures through activities modeling writing ideas related to each unit's theme. Students who complete this series will develop stronger writing skills and gain confidence in their ability to compose paragraphs and essays related to personal experiences or opinions.FeaturesWide variety of engaging writing topics including school, daily life, hobbies and interests, hopes for the future, giving advice, etc.Practical exercises and activities allowing students to organize and prepare their own passagesMultiple sample passages providing ideas to spark students' creative thinkingGraphic organizers t

Book DetailsReading Gate 150 is a three-book low-intermediate series designed to build confidence and fluency through guided reading practice. The series uses a rich collection of carefully written fiction and non-fiction texts with high-frequency vocabulary and useful sentence patterns. As students progress through the series, they will develop their vocabulary, syntax, reading fluency, and reading comprehension. Reading Gate 150 offers the right balance of challenge and support to help readers grow and move towards fluency.FeaturesInteresting topics and highly readable texts to help students stay engagedColorful, captivating photographs to aid in understandingHigh-frequency words and review words to promote reading competencyPicture-based vocabulary banks in each unit to provide visual word associationsReading comprehension activities to build language proficiencyPractical exercises to increase vocabulary, grammar, and sentence exposure while expanding reading abilitiesFull-color wor

Book DetailsReading Gate 150 is a three-book low-intermediate series designed to build confidence and fluency through guided reading practice. The series uses a rich collection of carefully written fiction and non-fiction texts with high-frequency vocabulary and useful sentence patterns. As students progress through the series, they will develop their vocabulary, syntax, reading fluency, and reading comprehension. Reading Gate 151 offers the right balance of challenge and support to help readers grow and move towards fluency.FeaturesInteresting topics and highly readable texts to help students stay engagedColorful, captivating photographs to aid in understandingHigh-frequency words and review words to promote reading competencyPicture-based vocabulary banks in each unit to provide visual word associationsReading comprehension activities to build language proficiencyPractical exercises to increase vocabulary, grammar, and sentence exposure while expanding reading abilitiesFull-color wor

Book DetailsReading Gate 150 is a three-book low-intermediate series designed to build confidence and fluency through guided reading practice. The series uses a rich collection of carefully written fiction and non-fiction texts with high-frequency vocabulary and useful sentence patterns. As students progress through the series, they will develop their vocabulary, syntax, reading fluency, and reading comprehension. Reading Gate 152 offers the right balance of challenge and support to help readers grow and move towards fluency.FeaturesInteresting topics and highly readable texts to help students stay engagedColorful, captivating photographs to aid in understandingHigh-frequency words and review words to promote reading competencyPicture-based vocabulary banks in each unit to provide visual word associationsReading comprehension activities to build language proficiencyPractical exercises to increase vocabulary, grammar, and sentence exposure while expanding reading abilitiesFull-color wor

Strict vocabulary control of all passages and activities allows students to gradually accumulate new vocabulary while practicing learned items from previous units.