"Joining in the effort to keep students engaged in the classroom, Microsoft on April 30 announced a new addition to its PowerPoint software that allows students to participate in classroom presentations. The best news: It's available free of charge.
The new tool, called Mouse Mischief, allows teachers to add multiple choice, yes/no, and drawing questions to their presentations. Students then use any computer mice (any device from the school will work) to answer these questions. The tool also allows for whole-class or individual student responses."