Sounds great - and good question. When you encounter a limit (either by trying to add > 3 members or > 5 projects), you'll get prompted to request additional capacity. Just fill out the requested information - if you enter the course name, topic and at what university, how many students you expect to have, a rough idea of the total number of projects you expect to create with your students, and when the course will run, we'll receive your request and set you up so you have what you need.