A few months ago I read a review of Explain Everything and had to try it for myself. I was impressed! The interface is intuitive and relatively simple. After recording your voice and screen gestures as you walk through a PowerPoint presentation, you can seamlessly upload your creation to YouTube. Give the students the link and you have a review “sheet”, a make-up for an absent student or the starting point for a flipped classroom. And at just $2.99 at the App Store it’s a steal!