Here, your fourth grader will learn how to measure heat and matter. Both heat and matter have dimensions, weight, and volume of objects that help in classifying them according to common properties. Learning such classifications today will help fuel your child's interest for higher learning tomorrow. Secure a copy now.

Looks at some of the visible ways that the earth can be changed in a matter of minutes, and discusses how the natural forces involved in earthquakes and volcanoes can raise mountains, build islands, change weather and help to produce varieties of plants and animals.

Bay Area-based reporters for The Guardian, Alastair Gee and Dani Anguiano, relate the story of the worst American wildfire in a century, weaving together a portrait of the remarkable California community of 27,000 souls, destroyed wholesale in a fire that left 86 dead, while offering a bigger-picture exploration of the science of wildfires in a time of dramatic climate change. Alastair Gee is a seasoned science/nature writer based in San Francisco...