Education Account - Can't add beyond 51


I have an education account, and the documentation states that I can have as many students on that account as I need; however, this term, some of my students experienced issues when creating the account. A message stated that I couldn’t have more than 50 members on a team. I have around 100 students. I cannot access my students’ workspaces as I have in the past. How do I correct this?
@bradydowling @mutahhir