Sometimes the best first step is to go to a place that has done some of the searching for you. I would suggest that you try the sites below for general searching. If you have a specific interest don't forget to check out the sites listed in the categories at the bottom of the page. The site also includes a wonderful reference collection, online texts, and excellent links to sites for teenagers or youth. A great place to start searching.
Site is broken down by subjects with the option to search their database of Internet sites.
Can find information on how to search the Internet, find a museum around the world, or check out a reference work online.