Mrs. Yollis' 3rd grade students use Twitter to challenge other classes around the world to "mystery number" math problems. They tweet clues and their answers each week. She also did a great international vocab project using twitter and blogs. Show students how they can meaningfully connect with other students around the world. Gives social media a concrete and educational direction, rather than just socializing (the "social media myth"). A great tech-savy educator! (Liz Kelley)