"Facebook Pages are still the way to go for educators. They are a completely separate site.....there is no cross over from a Facebook Page to a Facebook Profile allowing educators the ability to have their friends in one spot and their students in another keeping a safe separation between the two."
"goes WAY beyond your traditional math drill and skill games or math problem worksheets, and has students looking into challenging problems, and having fun doing it. Math Pickle features mathematics videos for students in kindergarten through twelfth grade."
This is a Math site geared toward making Math more engaging with various lessons. They offer games and lessons that work on Interactive Whiteboards. Resources are broken into 4 groups. K-5, 2-8, 5-10 and 11 and 12. Do some digging around to find the lesson that best fit your class.