Jennifer Boothroyd

See how birds use feathers for flight, warmth, camouflage, and much more.

Some mammals have a little fur or hair, others have a lot! Learn how fur helps these anim...

Compare different types of scales and discover how they protect the bodies of fish and re...

What animals have shells? See the wide variety, from armadillos and snails to crabs and t...

All kinds of animals have skin—even humans! Compare the many features of skin.

A colorful magnet holds a drawing to a fridge. Paperclips stick to a magnet. Magnetic fo...

You push a swing. Your brother pulls a wagon. Forces are at work all around you. But what...

An airplane soars through the sky. A wind gust blows through the leaves. Objects are in m...

A rock sinks in the water. A hot air balloon floats in the air. Many objects float and si...

A ball drops to the ground. Leaves fall from a tree. Gravity is at work all around you. B...

A baseball player slides on the ground to tag a base. A toy car's wheels rub against the ...

Why is it sunny outside one day and rainy the next? Readers will learn the ins and outs o...

What heats our planet? What also helps plants and animals to live and grow? Sunlight! Rea...

What does it mean to forecast the weather? How do weather forecasters do their jobs? Read...

Why is it hot in one part of the world and chilly in another? Readers will learn the ins ...

What are tornadoes? Blizzards? Hurricanes? Readers will learn the ins and outs of severe ...

Is it rainy? Cloudy? Stormy? Readers will learn the ins and outs of observing weather con...

Young readers will learn how light works and where it comes from in this accessible, phot...

Young readers will learn how colors are made in this accessible, photo-filled book. Simpl...

Young readers will learn how shadows are made with light in this accessible, photo-filled...

Young readers will learn how we send and receive messages using light and sound in this a...

Young readers will learn how we use our senses to see light and hear sound in this access...

Young readers will learn how vibrations make sound that we can hear in this accessible, p...

Many plants depend on animals to help move pollen around so that the plants can reproduce...

Some plants need to have pollen spread from one plant to another flower in order to repro...

Many insects drink nectar and collect pollen from flowers, and in the process they help p...

Some flowers are able to produce seeds or fruit without getting pollen from another plant...

What steps do you follow to take care of a pet? See how this responsible owner cares for ...

What strategy do you use to get your homework done? Follow this responsible student who t...

What routine do you follow to pack a healthy lunch? See how this responsible student plan...

Northern rockhopper penguins and colorful pufflegs are two examples of endangered birds. ...

Cape seahorses and speartooth sharks are two examples of endangered fish. Few of them exi...

Oahu tree snails and pink velvet worms are two examples of endangered invertebrates. Few ...

Asian elephants and Mexican long-nosed bats are two examples of endangered mammals. Few o...

Short-nosed sea snakes and blue iguanas are two examples of endangered reptiles. Few of t...

Lightning streaks across the sky. A lamp lights up a room. Electricity is all around you....

A light beach ball floats on the water. A heavy rock sinks in the mud. Matter is all arou...

Fireworks crackle and boom in the sky. Your friend laughs at a joke. Sounds are all aroun...

Ice cubes clink in a glass. Steam rises from a pot of boiling water. Solids, liquids, and...

A pot of water boils over a hot burner on the stove. Sunshine warms your skin on a breezy...

Light shines through your kitchen window. A campfire brightens the dark woods. You see li...

Food safety is important. What are some other good food safety rules to follow? And what ...

Trying new foods is fun! Eating a variety of fruits, veggies, and other healthy selection...

Eating a balanced diet is important. Healthy foods give you energy to learn and play. Do ...

Do you know why people choose the diets they do? Or how people on special diets can get a...

Would you want to swoop through the air like a bird? Riding a hang glider is a fun way to...

Helicopters can take off from almost anywhere and change directions quickly. They can eve...

Parachutes can be used for emergency landings. But they can also be used for flying fun! ...

What color are your eyes? Brown is the most common color. But some people have blue, gree...

What facial features do you have? Freckles are a common feature. So are turned-up noses a...