Photographs and simple text describe the different types of simple machines that people use in their everyday lives.

Updated for 2020, Intermediate readers distinguish between natural and man-made objects.

Updated for 2020, Early readers learn about different animal habitats.

Illustrates the transition from day to night and from night back into day as the sun rises and sets and as the moon passes through its phases.

In I Use a Mouse, readers will learn the basics of computers and be introduced to new vocabulary. Featuring real-life photographs, fascinating facts, a comprehension and extension section, and more, readers stay engaged while learning and strengthening their reading comprehension skills. Have you ever wondered about the science all around us? Plants grow and change, the Sun rises to warm the Earth, and matter changes from one form to another. Investigate...

This book introduces students to how important plants are to our planet and our existence and illustrates how plants have a positive medicinal effect in curing diseases, provide alternative forms of fuel, and help to reverse global warming.

Updated for 2020, Intermediate readers explore electricity.