Apps Advice on building a attendance tracking system

[hero0118]

Hey guys i was wandering if i can get some help on a project that i plan to start working on, basically the main idea for this app i want to build is that students will sign onto to this app with the university ID and click a button to sign them into a particular lecture. The lecture will then be able to see whos signed on i guess via a admin login of some sort.

I would like some advice on where i should look tutorials wise and just general ideas on how this can be implemented

thank you for your time