Should I use a high school or a university account?
As a high school teacher, should you use a high school professor account or a university professor account?
If you want to have full class, small group, or a very limited number of one-on-one conversations a high school account will be easier and less expensive.
If you want every student in your class to have multiple one-on-one conversations a university account will be easier and less expensive.
You can also read a more thorough discussion on the differences between a high school and university account, and how to convert your account to a university account.