Change registration process for students.
TinyTap looks like a great app but I won't be able to use it as you collect too much information about my students. Would you be able to alter your registration process to be similar to Google's CS-first courses? Students are given a QR code to scan, which automatically adds the to your class and gives them a unique user name and password. There is no need for names, date of birth etc and teachers can manually keep a record of who is linked to which username.
You can create student sub-accounts with TinyTap Insights. You may add student usernames, and create Unique user names for each student. Learn more about insights here: http://www.tinytap.it/activities/grrv/play/tinytap-insights-guide
We are working on launching QR login very soon!