This term interested student have created a Book Hook using the Green Screen, some creativity and the iPad app Green Screen by DoInk.
The process involved 4 steps.
1) Select your book and decide how to “sell” your book.
2) Take a photo of what you want as your background (to replace the green screen) using the CAMERA app.
3) Record your video using CAMERA app.
4) Open the GREEN SCREEN app and add the photo and then the video.
Preview then PUBLISH.
More detail at Use Green Screen Effects on the iPad
See the book hooks created by the students below (support was provided in the actual process).