Homework help online (enter the keyword from the homework page) go.hrw.com
National Geographic for Kids http://www.nationalgeographic.com/kids/
NASA for middle-school students http://www.nasa.gov/audience/forstudents/5-8/features/index.html
Great resource! Videos of brief lessons in all subjects, including Algebra. (For Algebra help, go to the "Browse Our Lessons" section in the lower left and click on "Algebra I") yourteacher.com