High School Teacher Creates New Educational App

I read in the article eClassroom News about a high school teacher that made an app for his students. I think the app would definitely be helpful to students from middle school, to high school, and even to college. Its always beneficial to have a tool like this one to allow students to interact between themselves and the teacher. I had never thought of creating an app myself. I didn't know it was possible and that anyone could do it. If I ever made an app for my classroom it would be more like a review of what they will be learning at school and some kind of game or puzzles to help them learn and be able to memorize things better.