Leveled Readers

Lighthouses have helped people navigate for centuries. But lighthouses are not built like they used to be. Learn how innovations like computers and solar power have improved lighthouse technology. Created in...

Finesse your sandcastle-building skills with this fun STEAM reader! Students will examine the properties of sand and factors that influence sandcastle construction such as moisture and sunlight. Created in...

Imagine changing the color of your skin or even your shape in an instant. If you were a cephalopod, you wouldn't have to imagine it--you could to it! Scientists are closely studying them to learn how to mimic their...

The Horten Ho 229 was an experimental German airplane created by the Nazis. They believed its innovative design would help them win the war. Although this experimental aircraft never worked as planned, it's still...

To be a chef, you need to have a great palate, knife skills, and... science skills? It's true, cooking requires more "science" than you may think! Learn about the innovations and technology behind great cooking with this...

On a hot day, what can people do to cool off? Learn about the many ways there are to keep cool. Created in collaboration with the Smithsonian Institution, this e-book builds students' literacy skills while fostering...

At Smithsonian's National Zoo, keeping the zoo animals happy and healthy is a big job. Part of this involves creating enclosures and habitats that make the animals feel at home. Learn how zookeepers designed a habitat for...

A marble rolls down a tube. It hits a doll, which knocks over some dominoes. Anything can happen in a Rube Goldberg Machine! These machines take simple tasks and make them complex and fun. Do you have what it takes to make...

How do wildfires start and what can people do to stay safe from them? This informative title teaches students about the causes of wildfires, how firefighters put them out, the differences between different types of fire,...

How do you build a reusable spacecraft that is strong enough to hold up in outer space, but is light enough to fly? How do you design it to meet the needs of the astronauts it carries? In the 1970s, NASA...

Many butterfly species are in decline. Fortunately, people can see butterflies up close at butterfly exhibits. What steps are required to plan and create a butterfly exhibit? Learn about the challenges that...

Visitors from across the country and around the world flock to U.S. national parks to explore their beauty. Little do they know that the National Park Service (NPS) has been guiding and enhancing their experience for...