Mikrotik - Configuration Hot spot for two groups of users

I would like the school to do hot spot. I have several wireless APs and Mikrotik RB 1100ah and a few manageable switches which are connected to a wireless AP.
Please, Your audit for such a solution.
I wish that every teacher had wireless access. Authentication would be to pass a login and password previously assigned to him.

I would also like to first 30 people (students) have access without authentication or for 30 students, only one, the same username and password.


The first thought is to create vlan1 teachers VLAN2 students.
On each of the VLAN to create a hotspot. For teachers, there is no problem, because I add each teacher one username and password.
For VLAN2 I do not know how to do it.
Mayby have you another solution?