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

    Henrietta spent years measuring star positions and sizes from photographs taken by the telescope at the Harvard College Observatory, where she worked. After Henrietta observed that certain stars had a fixed pattern to their changes, her discovery made it possible for astronomers to measure greater and greater distances—leading to our present understanding of the vast size of the universe.An astronomer of her time called Henrietta Leavitt “one of the most important women ever to touch astronomy,” and another close associate said she had the “best mind at the Harvard Observatory.” Henrietta Leaveitt's story will inspire young women and aspiring scientists of all kinds and includes additional information about the solar system and astronomy.

    In school she quickly skipped ahead several grades and was soon studying complex equations with the support of a professor who saw great promise in her. But ability and opportunity did not always go hand in hand. As an African American and a girl growing up in an era of brutal racism and sexism, Katherine faced daily challenges. Still, she lived her life with her father’s words in mind: “You are no better than anyone else, and nobody else is better than you.” In the early 1950s, Katherine was thrilled to join the organization that would become NASA. She worked on many of NASA’s biggest projects including the Apollo 11 mission that landed the first men on the moon. Katherine Johnson’s story was made famous in the bestselling book and Oscar-nominated film Hidden Figures. Now in Reaching for the Moon she tells her own story for the first time, in a lively autobiography that will inspire young readers everywhere.

     After receiving a stuffed animal chimpanzee for her first birthday, Jane Goodall's love of animals only grew. She saw what humans and animals had in common, not what makes us different, and used that to advocate for animal rights everywhere, becoming famous for her work with chimpanzees.This friendly, fun biography series inspired the PBS Kids TV show Xavier Riddle and the Secret Museum. One great role model at a time, these books encourage kids to dream big. Included in each book are:- A timeline of key events in the hero's history - Photos that bring the story more fully to life - Comic-book-style illustrations that are irresistibly adorable - Childhood moments that influenced the hero - Facts that make great conversation-starters - A character trait that made the person heroic and that readers can aspire toYou'll want to collect each book in this dynamic, informative series!

    While many people lived in fear of the Nazis, Irena defied them, even though it could have meant her life. She kept records of the children she helped smuggle away from the Nazis grasp, and when she feared her work might be discovered, she buried her lists in jars, hoping to someday recover them and reunite children with their parents. This gripping true story of a woman who took it upon herself to help save 2,500 children from the Warsaw Ghetto during the Holocaust is not only inspirational; it's unforgettable.

    But do you really know what a million looks like? If you'd like to see -- actually see, right now, with your own eyes -- what a million looks like, just open this book. Be prepared to learn some interesting things along the way. Like how many shoe boxes it would take to make a stack to Mount Everest. And be prepared to do some number wondering of your own. But, most of all, be prepared to be amazed. Because a million is a LOT of dots.

    Named Rags for his disheveled appearance, the little stray quickly finds a home with Donovan and a place in his heart. Although the Army did not have an official canine division, Rags accompanies Donovan to the battlefield, making himself a useful companion delivering messages and providing a much-appreciated morale boost to the soldiers. News about Rags spreads and soon the little dog's battlefield exploits become the stuff of legend. But during a fierce battle near the end of the war, both Rags and Donovan are wounded. Severely injured, Donovan is sent back to the United States. And the little dog with the big heart refuses to leave his best friend's side.

    Want to become an award-winning cartoonist and inventor? Follow your dreams, just like Rube Goldberg! From a young age, Rube Goldberg had a talent for art. But his father, a German immigrant, wanted Rube to have a secure job. So, Rube went to college and became an engineer.But Rube didn’t want to spend his life mapping sewer pipes. He wanted to follow his passion, so Rube got a low-level job at a newspaper, and from there, he worked his way up, creating cartoons that made people laugh and tickled the imagination. He became known for his fantastic Rube Goldberg machines—complicated contraptions with many parts that performed a simple task in an elaborate and farfetched way. Eventually, his cartoons earned him a Pulitzer Prize and his own adjective in the dictionary. This moving biography is sure to encourage young artists and inventors to pursue their passions.

    What began as an attempt to make army hospitals safer and more effective became a lifelong mission, and remains relevant today. This new picture book biography of Florence Nightingale, from celebrated author and artist Demi, beautifully portrays the story of Florence's life and explores the long-lasting effects of her career.

    . . is just one thing. But if I chop it in two, then chop the half in two, and keep on chopping, I get more and more bits, on and on, endlessly, to an infinity I could never ever reach.In 1887 in India, a boy named Ramanujan is born with a passion for numbers. He sees numbers in the squares of light pricking his thatched roof and in the beasts dancing on the temple tower. He writes mathematics with his finger in the sand, across the pages of his notebooks, and with chalk on the temple floor. "What is small?" he wonders. "What is big?" Head in the clouds, Ramanujan struggles in school -- but his mother knows that her son and his ideas have a purpose. As he grows up, Ramanujan reinvents much of modern mathematics, but where in the world could he find someone to understand what he has conceived?Author Amy Alznauer gently introduces young readers to math concepts while Daniel Miyares's illustrations bring the wonder of Ramanujan's world to life in the inspiring real-life story of a boy who changed mathematics and science forever. Back matter includes a bibliography and an author's note recounting more of Ramanujan's life and accomplishments, as well as the author's father's remarkable discovery of Ramanujan's Lost Notebook.

    And she wanted to wear pants!Inspired by the true story of Mary Edwards Walker, a trailblazing doctor who was arrested many times for wearing pants, this fresh, charming picture book encourages readers to think for themselves while gently challenging gender and societal norms.

    They had no idea that the skinny, underfed horse had one of the biggest and bravest hearts they’d ever known. And one of the biggest appetites!Soon Reckless showed herself more than willing to carry ammunition too heavy for the soldiers to haul. As cannons thundered and shells flew through the air, she marched into battle—again and again—becoming the only animal ever to officially hold military rank—becoming Sgt. Reckless—and receive two Purple Hearts.This is the first picture book from award-winning novelist Patricia McCormick, sumptuously illustrated by acclaimed artist Iacopo Bruno.

    Navy!After touring a German submarine in the early 1940s, young Raye set her sights on becoming an engineer. Little did she know sexism and racial inequality would challenge that dream every step of the way, even keeping her greatest career accomplishment a secret for decades. Through it all, the gifted mathematician persisted--finally gaining her well-deserved title in history: a pioneer who changed the course of ship design forever.The Girl With a Mind for Math: The Story of Raye Montague is the third book in a riveting educational series about the inspiring lives of amazing scientists. In addition to the illustrated rhyming tale, you'll find a complete biography, fun facts, a colorful timeline of events, and even a note from Montague herself!

    While most children's books in the 18th century contained lessons and rules, John Newbery imagined them overflowing with entertaining stories, science, and games. He believed that every book should be made for the reader's enjoyment. Newbery—for whom the prestigious Newbery Medal is named—became a celebrated author and publisher, changing the world of children's books forever. This book about his life and legacy is as full of energy and delight as any young reader could wish.