4th Grade

History is full of unsolved crimes, mysterious disappearances, and strange sightings. Readers will discover some of the most well-known mysteries in history--including Amelia Earhart, Big Foot, and the...

Mysterious events occur all over the world. It rains fish every year in Honduras, rocks in Pennsylvania make music, and large drawings can be found on the desert floors in Peru! Readers will learn about...

From Stonehenge to the Bermuda Triangle, there are many places on Earth that remain a mystery to scientists! Readers will discover these curious places--and more!--as they move through this fascinating...

Accelerate through the pages of this book and introduce readers to physics and how it assists objects to move. This stimulating nonfiction title includes real-life examples and basic experiments to...

Discover the different ways that people spend, save, and budget their money. Readers are introduced to important personal financial aspects such as savings accounts, putting together a budget and budget...

Featuring detailed photos and images, fascinating facts, and a helpful index and glossary for reference, readers will learn about the way animals of all kinds work together in cities of their very own...

Animal trainers care for many different types of animals! Children will explore some of the methods that trainers use, such as affection bonding and classical and operant conditioning, while...

Since the beginning of time, inventors have been coming up with new ideas. But many of them did not necessarily get it right on their first attempts. Far from it! Invention is a process of trial and error...