I have one moodle installation and multiple teachers. Every teacher must be able to add users to the system he/she will be teaching, in an easy way (preferably with a csv import). What I do not want is that the teachers see or change settings of users the other teachers work with.
To put it as simple as I can: every teacher should have his own environment and be able to only manage his/her own courses and students.
How can I do this as simple as possible without installing multiple moodle servers?