Tools or Techniques for managing classro

We’re looking for creative tools and/or techniques for managing the PCs in our classrooms. We have numerous departmental training rooms and each department will not share their room with other departments because frequently the ‘borrowing’ department renders the PCs in the room unusable or, at least, not clean for the ‘owning’ department, either by installing an incompatible app, or allowing the students to perform other undesirable tasks on the machine.