[Skryptec]

If you need a specific code after logging in as teacher, they usually have the code list on their desktop or their USB that has been plugged in... so what you do is develop software that makes a backup of those files and sends it to your email along with keylogging the teacher's PC in order to get the login credentials. Then you're in, voila! If he/she has the codes list psyhically, then you just have to wait until he/she is gone and then take a quick picture of something of it.

I'm not responsible for anything.