Many students can book one meeting of 30 min with one teacher - but calendly must show all teachers avalible times

Hi,
You can set up a team page that includes multiple users (teachers, in this case). Then, create a round-robin event type between the teacher's accounts so students can schedule a 30-minute meeting as long as one teacher has availability.

Round Robins are a great tool to use for this too!

If you’d like your students to be able to select their host first, you would need to follow one of the guides I’ll link below. Round Robin events works by a rotating assignment and doesn’t support selecting a host first. You can read more on this below!

• How to let invitees choose their host using a team page
• How to let invitees choose their host using Routing Forms