Students are getting back into the swing of this whole school thing for the year, but sometimes it’s what they do outside of the classroom that can make the biggest difference while in it. PC Mike Wendland has three such back-to-school apps for elementary-, middle-, and high school-aged students. TeachMe: Kindergarten is a great app for youngsters just starting out in school. The app introduces the basics of math, reading, and writing. Keep the little ones engaged and wanting to play with coins they earn for correct answers, which they can use to buy in-app stickers. The app is $1.99 for iOS. iTooch Middle School delivers more than 10,000 exercises…