Half come two days a week or less. so it's almost impossible to master a subject like mathematics where you build on what you learned and each rule builds to a new one. it's remarkable, frankly, that only 68% of my children failed the courses because there were much lower percentage that showed up more than three days a week. >> gretchen: typically what happens is when they fail these course examines they have to go to a summer program that has a ing outlar name, but you say, is a double whammy negative because they go to the summer program, but what does it actually do? >> just to be technica...