Grade 4

Ground frogs are great jumpers. Some of these amazing amphibians can leap almost 20 times the length of their bodies! That would be about the same as a person leaping the full length of a… More →

On December 26, 2004, carpenter Ari Afrizal was helping build a house on the Indonesian island of Sumatra. Suddenly, he heard a loud whooshing sound and saw a wall of water heading directly… More →

Many people believe that a person can get warts just by touching a toad. While this enduring myth is not true, a toad's warts are harmful to many of its predators. The warts produce a poison, More →

Roller coasters offer riders high speeds and thrilling drops! The fastest roller coasters can reach speeds over 100 miles per hour! Eager students will plunge into learning about how roller… More →

All frogs are amphibians, but only aquatic frogs live nearly all their lives in water. Some of these water frogs can do amazing things! For example, the Indian water frog can run along the… More →

On May 12, 2008, a strong earthquake rocked Beichuan, China, destroying buildings and entire neighborhoods. When Beichuan's high school collapsed, 16-year-old Li Anning and her friends were… More →

A hungry eagle flies slowly above the rain forest canopy, looking for its next meal. Will it spot the emerald boa coiled on a tree branch? It's tricky—-these snakes are bright green with… More →

Tony Gonzalez is one of the best tight ends in NFL history. A ten-time Pro Bowl selection, he holds the NFL record for touchdown catches, receiving yards, and total catches by a tight end.… More →

Toco toucans have a surprising way of protecting themselves from predators. These birds have multicolored feathers and big, reddish-orange beaks that should make them easy to spot—or so you… More →

As a kid, Adrian Peterson got the nickname "All Day" (A.D.) because he was always on the go. As an adult, teammates still call him A.D., because he never stops working. Adrian's tremendous… More →

Part airplane and part helicopter, the V-22 Osprey hovers in the air as U.S. Marines jump behind enemy lines. Kids will learn about the V-22 Osprey’s vertical take-off and landing, defensive… More →

The fastest salt flat racers can reach speeds over 750 miles per hour! Students will learn about the salt flats, the history of salt flat racing, and the technology behind some of the fastest More →