To go along with what some of the other posters have said. First the instructor must feel comfortable using TECH themselves...
But I believe the easiest and quickest methods are to utilize tech for assignment & quizzes, as well as working online multimedia into lesson plans.
There are so many other teachers that have taken the time to create videos, models etc. that can be used freely it's a shame not to expose more students to them.
As a guitar instructor I know I've used different tools online to help students learn to play guitar
more effectively then with just books.