The idea is simple. If we put ourselves in the teachers position we try to make things very clear and easy to understand. Then why not take advantage of this in school.
Engage the students with an assignment to record their own educational video. Even if it is math and the student is not entirely correct its still hundred percent worth it.
This is idea is not necessarily for making the student a teacher. Instead it can be thought of as a video paper essay.
Come to think of it. Video exams or papers could perhaps be used in online education or MOOC’s. Just record the test and upload it for review.
For this you can simply use the video recorder on the smartphone and a flexible holder.