When did the dinosaurs live? What other animals lived at that time? Which dinosaur was biggest? How do we know about dinosaurs? Find out the answers to these questions and more as Jack and Annie track the facts. Filled with up-to-date information, photos, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discovered in their favorite Magic Tree House adventures.From the Trade Paperback edition.

    "A fast-moving novel based upon an actual historical incident with a spunky heroine and fine historical detail."--School Library Journal. Author's note."There are few authors who can consistently manage both to entertain and inform." --Booklist

    She wants Nate to help her find it. Nate the Great must get all the facts, ask the right questions, and narrow the list of suspects so he can solve the mystery.

    in full color. "Winter's story begins with a peg-leg sailor who aids slaves on their escape on the Underground Railroad. While working for plantation owners, Peg Leg Joe teaches the slaves a song about the drinking gourd (the Big Dipper). A couple, their son, and two others make their escape by following the song's directions. Rich paintings interpret the strong story in a clean, primitive style enhanced by bold colors. The rhythmic compositions have an energetic presence that's compelling. A fine rendering of history in picturebook format."--(starred) Booklist.

    In a series of spreads a rabbit hops, a crow flies, a horse trots, a gull glides and an eagle soars. . . . Wry line and watercolor art portray physical features and animal landmarks.

    Everyone has heard of Albert Einstein-but what exactly did he do? How much do kids really know about Albert Einstein besides the funny hair and genius label? For instance, do they know that he was expelled from school as a kid? Finally, here's the story of Albert Einstein's life, told in a fun, engaging way that clearly explores the world he lived in and changed.

    If you had a beaver's, you'd have orange teeth! And if you had a naked mole rat's set of teeth, you could move each one separately, like chopsticks! The animal kingdom has lots of cool teeth, but yours are pretty awesome, too!

    Franklin also designed the lightning rod, suggested the idea of daylight savings time, and invented bifocals-all inspired by his common sense and intelligence. In this informative book, Gene Barretta brings Benjamin Franklin's genius to life, deepening our appreciation for one of the most influential figures in American history.Now & Ben is a 2007 Bank Street - Best Children's Book of the Year.

    We can't see air moving, though we can watch it push clouds across the sky, or shake the leaves of a tree. We call moving air the wind. In this enlarged edition, find out about the wind - what causes it, how it can be used to help us, and how it affects the weather.

    It was from other field hands that she first heard about the Underground Railroad which she travelled by herself north to Philadelphia. Throughout her long life (she died at the age of ninety-two) and long after the Civil War brought an end to slavery, this amazing woman was proof of what just one person can do.

    SEE INSIDE AN AMAZING 14TH-CENTURY CASTLEFrom the creators of INCREDIBLE CROSS-SECTIONSWHY...did castles have wooden walkways around the top of their walls?...did one castle attacker set fire to 40 dead pigs?...was the longbow such a fearsome weapon?WHO...was a "gong farmer"?...catapulted animals over the castle walls?...ate elaborate dishes of porpoise and peacock?WHAT...was strewn on castle floors?...was a quantain?...was a squire's job?Follow the story of life in the castle in both peace and war - and find the enemy spy!

    A book that's as entertaining as it is educational. Full-color illustrations.

    In ancient Greece, young Pythagoras discovers a special number pattern (the Pythagorean theorem) and uses it to solve problems involving right triangles.Book Details: Format: Paperback Publication Date: 4/1/2004 Pages: 32 Reading Level: Age 8 and Up

    A young boy and his father visit the Vietnam Veterans Memorial.

     If there was one thing James loved to do more than anything else, it was to be in the great outdoors watching his beloved feathered friends. In the fall of 1804, he was determined to find out if the birds nesting near his Pennsylvania home would really return the following spring. Through careful observation, James laid the foundation for all that we know about migration patterns today. Capturing the early passion of this bird-obsessed young man as well as the meticulous study and scientific methods behind his research, this lively, gorgeously illustrated biography will leave young readers listening intently for the call of birds large and small near their own home.