Pixntell lets you create a slideshow from photos you take off your phone. You can then narrate over the slide show to explain different things that are going on in the short film.

https://www.plickers.com

Plickers is a website that gets all students participating in class, and allows the teacher to pose a question, and students can then hold up a card with their answer. The teacher then takes a smart device such as an iPad and it will scan all the answers and give data back.