Nine Black students were chosen to integrate Little Rock Central High School in Arkansas in 1957. The Little Rock Nine endured what followed not only as a group but also as individuals. At fourteen years old, Carlotta Walls was the youngest member of the brave group. As angry mobs protested, the students were escorted in the high school by members of the 101st Airborne Division, which had been called in by then-president Dwight D. Eisenhower to ensure...

Tinkering is a way of learning through hands-on activity -- experimenting with materials and devices to see how they work, taking things apart, making small changes and improvements, exploring and inventing. Tinkering may seem like a form of play -- and it is -- but it is also a powerful way of discovering truths about science, engineering, and math. With this book, Curt Gabrielson follows up on his best-seller Tinkering: Kids Learn by Making Stuff...