Happy Long Weekend,
Here are a few apps that I have found to add to your collection. The first is “Classroom Messenger”. It is a full service communication app. It allows you to communicate with parents and students. I got it for free, but had to search the internet, rather than the App Store, to find it.
The second is “PDF Cabinet 2.0”. It is on Appsgonefree today (May 19th). It allows collaboration among students on the same pdf. Full editting, hi lighting , etc.