Lessonator is a tool for creating beautiful music slideshow presentations on your Mac. It’s like a mashup between Apple’s Keynote and Garageband, where each slide is an animated music score. Lessonator creates and plays interactive slideshows containing 3d instruments, audio, video, notation (standard & tabs), images, diagrams and text. These slideshows are interactive because they can animate, ask questions, receive answers and track your musical progress.

Very cool looking app and a great idea.