First, you need to determine two things.

Who are your end users? These are the people who will actually take the workshop or use your product/service. It sounds like those are students.

Who are your buyers? These are the people that will pay for your service. As an example, parents are the buyers of toys but kids are the end users.

Who is paying for these workshops? Are schools your buyers and students your end users? Are parents the buyers and schools necessary to involve? Why? Selling to schools is very hard. Are you sure you need to? Why not go to students directly? If you're using schools as a way to reach students, would a student organization be a better, more approachable organization?

You need to start with your objectives and look for the path of least resistance. If you're just trying to secure students and a place to host a workshop, there are easier ways than working with schools unless the school benefits greatly.

Lots to think about. Let me know if you want to have a call and discuss.