Women have made some of the most important scientific discoveries of all time. In this title, readers learn about mathematician Katherine Johnson from her early career as a human computer to her work putting the first man into space, the first man into orbit, and the first man on the moon. A timeline, sidebars, fun facts, glossary, and index supplement the text. Aligned to Common Core Standards and correlated to state standards. Checkerboard Library is an imprint of Abdo Publishing, a division of ABDO.