I was in the main office the other day and I heard a chemistry teacher singing the praises of his Apple TV. When reviewing homework (lots of math in chemistry), he asks students to mirror their iPads. If a student has a question, he asks that student to mirror her iPad so the class can look at her work. They work together to find the mistake and correct the problem. Then they move on to the next one. He said the students love sharing their work with the class and helping each other find mistakes … it’s like a puzzle (for the whole class to work on together).