Every student can have their own private models, which they can view. It's not possible for the teacher to view the models of the students unless they publish it to the public library.

Hello markb.tech68,
This is something I would really like to work on at some stage.
A good number of classes from around the world are using Mecabricks including my cousin who is a teacher in France. Probably later this year I will try to work with him to understand the requirements.