But do you know about the mathematical genius who made sure that Apollo 13 returned safely home?As a child, Katherine Johnson loved to count. She counted the steps on the road, the number of dishes and spoons she washed in the kitchen sink, everything! Boundless, curious, and excited by calculations, young Katherine longed to know as much as she could about math, about the universe.From Katherine's early beginnings as a gifted student to her heroic accomplishments as a prominent mathematician at NASA, this is the story of a groundbreaking American woman who not only calculated the course of moon landings but, in turn, saved lives and made enormous contributions to history.

    GCF) vows to track it down. Knowing that the villainous Dr. Brok likes to disguise his ill-begotten fractions, GCF invents a Reducer—a tool that strips away the disguise, reducing the fraction and revealing its true form. Equal parts of action and humor add up to a wholly entertaining introduction to simplifying fractions.

    Much more than the "facts of life" or “the birds and the bees," Sex Is a Funny Word opens up conversations between young people and their caregivers in a way that allows adults to convey their values and beliefs while providing information about boundaries, safety, and joy.The eagerly anticipated follow up to Lambda-nominated What Makes a Baby, from sex educator Cory Silverberg and artist Fiona Smyth, Sex Is a Funny Word reimagines "sex talk" for the twenty-first century.

    Huge numbers are hard to comprehend. This book explains quantities in terms children can understand. For example, one million dollars could buy two full pizzas a day for more than sixty-eight years.

    Wrote The Sand Reckoner and Got Killed Being Rude, ante meridiem (a.m.), Donner and Blitz in German, One Million, Euclid Wrote The Elements, Squares, Pacific and Atlantic Oceans, Whales Are Not Fish, The “There Are Zero . . .” Game, Sets, the Popularity of Zero, Why Boats Are Cheaper to Rent in the Winter, Triangles, Herbivores and Carnivores, the Colors of the Rainbow, a King in Checkmate, the Story of the Titanic, ≠ (not equal), x + 4 = 7, One Thousand, Counting by Hundreds, Reading 3:05 on a Clock, Rectangles.

    Only one problem—at night, Chris doesn't feel so brave. He's afraid of the dark.But when he watches the groundbreaking moon landing on TV, he realizes that space is the darkest dark there is—and the dark is beautiful and exciting, especially when you have big dreams to keep you company.

    Against the backdrop of Archimedes's life and culture, the author discusses the man's work, his discoveries and the knowledge later based upon it. The simple, often humorous, illustrations and diagrams greatly enhance the text. Ages 10 and up.

    Full color.

    One day, a man exhausts himself trying to chop down a giant kapok tree. While he sleeps, the forest’s residents, including a child from the Yanomamo tribe, whisper in his ear about the importance of trees and how "all living things depend on one another" . . . and it works. Cherry’s lovingly rendered colored pencil and watercolor drawings of all the "wondrous and rare animals" evoke the lush rain forests, as well as stunning world maps bordered by tree porcupines, emerald tree boas, and dozens more fascinating creatures.Awards: IRA Teacher’s Choice (1991), ABA’s Pick of the Lists, Reading Rainbow Review Book, NSTA-CBC Outstanding Trade Book for Children

    Open 365 days a year and unrestricted by the constraints of physical space, each title in this series is organized into galleries that display more than 200 full-color specimens accompanied by lively, informative text. Offering hours of learning, this first title within the series "Animalium" presents the animal kingdom in glorious detail with illustrations from Katie Scott, an unparalleled new talent.

    Queen's count! Two, three! We are the marching infantry! Poor Joe! He wants to march in the parade, but every time the lines are uneven, he must stand aside. What's a poor bug to do? Joe is determined. He studies the problem, relining the twenty-five bugs in his squadron from two lines to three lines to four lines, until inspiration and fortitude result in five lines of five -- and Joe fits in the last.

    Get the buzz on bugs in this picture book from Angela DiTerlizzi!Grab your magnifying glass!Find your field guide!And come hop, hide, swim, and glidethrough this buggy backyard world! Featuring insects including butterflies and moths, crickets and cicadas, bumblebees and beetles, this zippy rhyming exploration of backyard-bug behavior is sure to have insect enthusiasts of all ages bugging out with excitement!

    Each spread features an easy-to-understand scenario such as dice rolling, with questions about probable outcomes and simple explanations. In the vein of Great Estimations, this is a perfect book for getting across important math concepts in a fun way.

    Meet Polygon and Plane, Reflection and Rotation, Odd Number and his buddy Even Number and the three amigos Sine, Cosine and Tangent. Discover the secrets of their world and how they like to throw their numbers about. Bringing his charming manga-style artwork and tongue-and-cheek approach to explaining the basics, Basher brings a whole new spin to the world of higher math.

    Maps tell you about the world: where various countries are located, where the jungles and deserts are, even how to find your way around your own hometown. If you take a fancy to any place on earth, you can go there today and still be home in time for dinner. So open a map, spin a globe. The wide world awaits you.Supports the Common Core State Standards