I’m not going to link all the previous topics with similar titles “help! a big new student project!” but if you search for them you’ll find them and all the associated discussions parallel to this one.
There is a feature request for this: Add a ‘sandboxed’ project category for educators having students use iNat - Feature Requests
And for this: Provide more guidance when creating new projects - Feature Requests
Also, a feature request for a separate kind of student account was turned down, but see Tony’s review of the conversation: Create Separate Accounts for Students Assigned to Use iNaturalist - Feature Requests
Also somewhat related: Addition of Teacher Friendly Features To Traditional Style Projects - Feature Requests