Please keep in mind that the PTA has not participated in the development of these sites. The PTA does not exert any editorial or other control over the material found in these sites. The Internet contains a vast amount of resources for children to explore.
Some websites are more appropriate than others.
It is always recommended that a parent assist and supervise their child during this process. This dog's trick is a clear, fun guide to basic grammar. Here is a great website from the Discovery Channel. The almanac people have put together a site that includes timelines, homework help, study advice and writing tips. This site is appropriate for all age levels.