Hi Colin that pre-req is more advice in avoiding students overwriting each others changes, getting in each other's way etc. A non-shared DB gives the student a clean start with no distraction or confusion. If you've already got an environment and your students are shown how to stay apart, then it should be fine. To be sure perhaps a senior colleague should clean up and re-set before and after each student.
------------------------------
John Carter
Professional Services
Blue Prism
------------------------------