A rheostat controls the light intensity coming from the incandescent lamps in the instrument heads, and the battery handle utilizes a bayonet for chan...
Soaring over mountains, winding down roads, and over the ocean, a tiny seed travels many dangerous paths before it can grow into a healthy plant in Er...
Covers human evolution from primitive humans who walked the Earth over 4 million years ago to anatomically modern humans who existed until about 30, 0...
This book in intended for the teacher who seeks to use the power of maps to their full potential and to show the non-orienteering teacher that the spo...
Here is a creative teaching tool for all science disciplines. Investigate everything from root growth, chemical reactions, density, enzymes in fruit, ...
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