It can be difficult to keep different historical events and figures straight in your head, which is why I Used to Know That: World History presents major episod

Do you know why we are able to see light and hear sound? What is the Earth made of? How does the body produce energy? And, most important, does any of this matt

Travel back through time to learn about the invasions of Britain, the Renaissance, the American, French and Russian Revolutions, World Wars I and II and the Col

This small but mighty collection will trigger your memory with fun facts you learned in school-from adverbs to the Pythagorean Theorem. Witty, engaging, enterta

Relearn the essential rules of the English language, from grammar and punctuation to sentence construction. Also includes parts of speech and how to improve you