Exactly. I have some weak students. They love computer tasks, and when they get it wrong the computer forgets it, and when they get it right (after 6 attempts) they get a shiny gold star. Now they do lots of other things as well - book work, worksheets, mental maths books. The computer provides them a boost once a week but I would never use it all the time. I have an ipad, have gone down the trying to teach with it route. But to be honest I don't think it will work. What is the point of passing an ipad to a pupil to show me the answer when I have a pen and paper, a whiteboard and marker? There's me standing at the front with a shiny ipad, showing the pupils what I want to show them, and in return they have to write in their exercise book with a pen?