I am in the process of setting up a training for teachers to practice building their own learning activities in Buzz. For them to be able to easily view, and possibly co-build with peers, I am planning to create grade level sandboxes courses. Each grade level teacher would be building content in their own folder within their respective grade level sandbox course. Is there risk of issues having up to 5-15 educators building in the same course at the same time? If so, what would be your recommendation?