Thanks a million to Susan Gertz for the following correction! I just wanted to point out that the URL listed for the grammar practice was not correct. It is http://www.longleaf.net/newsroom101/ rather than http://www.longleaf.net.newsroom101/. The site is very useful. Susan -- Susan Gertz Creative Development Center for Chemistry Education voice: 513.727.3389 fax: 513. 727-3328 4200 East University Blvd. http://www.terrificscience.org Middletown, OH 45042 [log in to unmask]