Much the same as above, NEA's page for all things Grades 6-8 also supplies a fantastic variety of resources and links to choose from. A valuable resource for all things Educational as well as "Math Awareness Month".
A motivational video for kids of all ages (even adults!), this video can help your students get motivated to know how math can open up possibilities of all kinds! This is not only motivational for students but for adults as well. Visit their website for all kinds of great info on how to motivate your students (and yourself): http://www.WithMathICan.org