Make your own Wii smartboard
Rather than spending thousands of dollars per classroom, students and faculty could make them in the building. With a project like this in your school, this could be a great way to do some electronics, system design and get a taste of mass production of the components. While this may not fit in to your current curriculum to have students build these systems, it could be a great way to collaborate across subject areas, or it could be a great after school club activity.