I've been using this great program since October '04 and I haven't used a projector since! I use it daily to teach a lesson from my computer, monitor students' progress, and shut down the lab at the end of the day. I've used other programs like AB Tutor and they don't compare in functionality, ease of use, and price. I appreciate the design purpose of AB Tutor for practical classroom usage and not for the purpose of making money.