I use this project in my Honors PreCalculus and PreCalculus classes. It could also be used in Algebra 2. Students are required to create a "Khan Academy" style video explaining the connection between the unit circle and the sine/cosine graphs. My students LOVE this project and enjoy all of the creativity involved. I even give extra credit for creative themes used in the video.
A rubric is included. Also, I listed several apps that I let my students use. If your class does not have computers or iPads, students can complete at home using Windows Movie Maker or iMovie on a desktop. These applications are free on respective computers.