This book allows you to present scientific principles and simple mechanics through hands-on cooperative learning activities. Using inexpensive materials (e.g., tape, paper clips), students build simple machines-such as levers, pulleys, spring scales, gears, wheels and axles, windmills, and wedges-that demonstrate how things work. Activities have easy-to-locate materials lists, time requirements, and step-by-step directions (usually illustrated) on presentation. Ideas for bulletin boards, learning centers, and computer-assisted instruction are an added bonus.
We are always trying to save it. We fit more and more into less and less of it. But no matter what we do, there is never enough of it. With acute insight and mordant wit, James Gleick examines the biological, psychological, and cultural considerations that define our very human limits where time is concerned. He begins with "technological" time: the development of the watch; the advent of standard time; the jolt of recognition brought about by machines in which speed could be measured, computed, or adjusted; photography's ability to freeze a fast-moving world; computer-generated time.
What exactly is new in fitness? In the exercise world, there’s something new in equipment, research, classes, gadgets, videos, and Web sites just about every day. The last few years have also seen the invention and marketing of new schlock—like pills that claim to eliminate cellulite or burn extra carbohydrates and machines that purport to tone your thighs “without any effort on your part.” It’s all too easy to get confused by all the myths and mixed messages out there.
