NASA for middle-school students http://www.nasa.gov/audience/forstudents/5-8/features/index.html
National Geographic for Kids http://www.nationalgeographic.com/kids/
Fun activities - by girls....for girls. http://www.missoandfriends.com/
Spanish (7th grade Paso a Paso A, 8th grade: Paso a Paso B) Instructions: Click on the book,then look for chapter and finally activities. http://www.phschool.com/atschool/paso/
Science: 8th grade (Motion, Energy and Forces) http://www.phschool.com/atschool/science_explorer/index.html