The Scientific American Website
This is the oldest and best of the popular magazines about science. At this website, you can follow the developments in the study of science presented in clear, concise form by the scientists themselves, not a science reporter interpreting what a scientists says. You can download past articles and read the new ones. You may ask online questions of scientific experts.
http://www.sciam.com

Measurement conversions
Use this web site to make unit conversions, for example, Fahrenheit degrees to Celsius degrees.
http://www.sciencemadesimple.net/conversions.html

Public Understanding of Science and Technology
This site provides access to a National Science Foundation report on public understanding of science. You can access the whole report or just Chapter 7 called; Science and Technology: Public Attitudes and Public Understanding.
http://www.icasl.org/www/nsf.html