Introduce pre-readers to the math concept of length with eight goofy, non-standard measuring units, including kittens, toy airplanes, and gumballs. Delightful composite photos and a sprinkling of text illustrate the length of a shark, a lemur tail, a crayon, and more.

Eight outside-the-box measuring units, from ducks to donuts, introduce pre-readers to the math concept of volume. Wonderous composite photos and a dash of text illustrate the volume of a bus, a bathtub, a teacup, and more in fresh, non-standard ways.

Llamas, hot dogs, and six other silly, non-standard measuring units demonstrate the math concept of weight. Pre-readers learn the weight of a car, a hummingbird, a burger, and more through the use of surprising composite photos and a bit of text.

Flamingos, jack-o'-lanterns, and six other fun, non-standard measuring units demonstrate the math concept of height. Through the use of whimsical composite photos and a hint of text, pre-readers learn the height of a giraffe, a snowman, a tennis ball, and more.

Stunt performers climb buildings, jump from airplanes, and take other thrilling risks to make movie magic. Learn about the dangers stunt performers face, the training and gear that keeps them safe, as well as the history behind the profession.

Take flight with the pilots who keep both the skies and land safe. Explore their careers, the thrilling technology they use, and the dangers fighter pilots face every day. Detailed diagrams and colorful photographs will engage readers with the text.

Smoke jumpers jump out of aircraft to fight wildfires in remote locations. They work as a team to keep people safe. Learn about their gear, their techniques, and the dangers these firefighting heroes face.

Without ice road truckers, people in the coldest regions of the world wouldn't be able to survive. These trucks bring the food, fuel, and other necessary supplies to very isolated communities. Learn about brave journeys across frozen roads, and see how truckers stay safe to deliver the goods.

Life in the fast lane is a typical day's work for race car drivers. Discover the history of racing, the dangers drivers face, and the ways they stay safe on the track. Keep reading with fascinating diagrams and new vocabulary!

Martin Luther King Jr. believed everyone was equal. He worked hard to peacefully change laws and unite people. Let’s celebrate him on Martin Luther King Jr. Day.

Since George Washington, the United States has had many presidents. Let’s celebrate them and the work they did on Presidents’ Day.

If you think construction workers have a tough job, try doing it underwater. These professionals stay underwater for hours to build bridges and buildings beneath the surface. Dive in to explore the history of underwater construction workers, the tools they use, and the dangers they face every day.