The Sun is our greatest source of energy. Without its light and heat, life on Earth would not exist. For centuries, people have used the Sun's energy to heat their homes and cook meals. Today, we use
Many people love the taste of sweet corn. But did you know that corn can also power cars and trucks? Corn, sugarcane, and other plants are used to make a type of fuel called ethanol. Learn how ethanol
A waving flag, blowing leaves, a kite soaring through the sky-all are moved by wind power. Wind is also our fast-growing source of energy. Find out how wind forms and the different ways we may use it
Our lives would be very different without oil, gas, and coal. These fossil fuels help heat our homes, turn on our lights, and power our cars and trucks. But they also damage our environment—and they w
As the energy crisis deepens, alternative energy sources are being explored throughout the world. Although nuclear energy is powerful and dangerous, we have been able to harness its technology to ben
In this bilingual series, ELLs learn that eating many different types of foods every day helps them to be healthy and strong. Featuring the government’s new, updated food pyramid, each book explains h
Focusing on a key topic in the second grade social studies curriculum, Life on the Edge explores how people adapt to their environment and how they impact it. Readers will learn about life in four fas
Focusing on a key topic in the second grade social studies curriculum, Life on the Edge explores how people adapt to their environment and how they impact it. Readers will learn about life in four fa
Focusing on a key topic in the second grade social studies curriculum, Life on the Edge explores how people adapt to their environment and how they impact it. Readers will learn about life in four fas
Focusing on a key topic in the second grade social studies curriculum, Life on the Edge explores how people adapt to their environment and how they impact it. Readers will learn about life in four fa
Explores the culture of ancient Rome, including how people lived, what they ate, how they traveled, the work they did, and what they did for entertainment.
Explores the culture of the Middle Ages in Europe, including how people lived, what they ate, how they traveled, the work they did, and what they did for entertainment.
Life Long Ago brings ancient civilizations to life and reinforces important early elementary social studies standards such as time, continuity, and change. Students will learn what daily life was like
Life Long Ago brings ancient civilizations to life and reinforces important early elementary social studies standards such as time, continuity, and change. Students will learn what daily life was lik
