Calling all superheroe's in training! The Addvengers intiative needs your help defending earth from the clutches of evil. You have one week to master the skills needed to save the world, and impress your friends with your awesome math skills. Prepare for a fun filled class that will teach you addition, subtraction, and even some multiplication. Think you're up for it? Oh, and one more thing. ADDvengers... ASSEMBLE!