Henry Carter Hull

For many children, geometry is best understood as a hands-on subject. What better way to explore concepts such as area, perimeter, and volume than actually measuring area, perimeter, and volume? With this handy resource, children will build polygons out of pipe cleaners and flexible drinking straws, explore Mobius strips made from index cards, and model the Pythagorean Theorem using cheese crackers. These activities and more can be found in Junk Drawer...

How to use reuse and recycle components and supplies to build a variety of devices The 20 easy-to-build robots in this project book can be constructed for little or no cost using common household objects and repurposed materials. From learning how to turn a toothbrush, an old cell phone or pager, and scrap wire into a Brush Bot, or how to hack a toy car to hotwire a Not-So-Remote Bot, each hands-on project contains a materials list and detailed step-by-step...

Algebra as a hands-on subject? With this helpful resource, you can simplify equations using pennies and nickels, use aluminum foil to multiply polynomials (the FOIL method), create coordinate graphs with candy, examine exponential decay functions with a bouncy ball, and much more. Junk Drawer Algebra proves that you don't need high-tech equipment to comprehend math concepts -- just what you can find around the house or in your recycling bin. Each...