I could make announcements about times and dates and students could develop an anonymous code name and play against other students/ grade level or just skill- fun meet the teacher for start of year intro.
The 100 Best Web 2.0 Classroom Tools Chosen By You - Edudemic
How to lock iPAD or iPhone Screen, so Children Stay within the App You Want Them to? - No More Accidental App Deletion or Unwanted App Re-arrangement! -- very helpful iPhone iPad tips for parents and teachers.