History of Science and Technology: Edison’s Light Bulb
Thomas A. Edison was one of the most prolific inventors in American history. On January 27, 1880, he received a patent on the light bulb that looks very much like the one we still use today. On this site from the Franklin Institute you will find a brief biography of Edison, focusing mainly on his interest in inventing a useable incandescent light bulb. Instructions are included to teach you how to make your own light bulb. www.fi.edu/learn/sci-tech/edison-lightbulb/edison-lightbulb.php
TV411: Ratios in the Kitchen
You can’t get away from using math–not even in the kitchen. This engaging site deals with ratios and how they are important in cooking. You need to understand the relationship between numbers or quantities to have the recipe turn out the way you want it to. Find the different ways of expressing a ratio in numbers and in words, watch a slide show, and get feedback on your answers. Additional practice in using ratios is suggested.
www.tv411.org/lessons/cfm/math.cfm
