(Sample link) NASA for middle-school students http://www.nasa.gov/audience/forstudents/5-8/features/index.html
(Sample link) National Geographic for Kids http://www.nationalgeographic.com/kids/
This is the site that we used in English class. Remember to scroll down to the Language Mechanics Section. http://www.internet4classrooms.com/skills_7th_original.htm
Mrs. Farquhar-Nelson's webpage http://teacherweb.com/NY/HoneoyeCentralSchool/MrsFarquhar-Nelson/