Question

If we, as a school, have 50000 pages of lessons and 5000 students...

1. Will it be ok to have the students as guests? We want students to be able to read lessons on a private link (accessed by SSO).
2. Will there be any crashing / slowness of the system if we have that many students on at a time, with that many pages?

Answer 1

1- You will need an enterprise account for that number of users or guests. See Notion Pricing.

For students you should manage them by class or using a logical structure and for that you can use private team spaces for example.

2- If you structure the data correctly, no problem.

Of course if every page has 1 GB of content, no structure, no nothing, then the scenario can change.

So if everything is done correctly, everything should work just fine.