There are a number of applications and programs available to help teachers to manage their studios. Moosic Studio was recommended at today's meeting of the Fairfax Loudoun Music Fellowship. I've been sent another recommendation, way back in my email inbox somewhere! Since I've never taught more than 15 students at a time, I haven't needed this time saver.
I think there might be free programs as well(another word for application, but application generally denotes for cell phone/ iPad use only.).
The teachers that met today also were highly interested in a seminar about helpful apps during lessons. I should look into that more! Two out of the 15 teachers there use their iPad in lesson regularly.