1. If you have unlocked once, you can trust that the test is unlocked. Notify the student that you have unlocked the test. It's the nature of the Edmentum system to show it as "locked" again.
2. Same as above. The Alert legends reset themselves to original looks. Rest assured, we will know that you have graded. :)
3. You do not have to create any activities. But, when you respond to students, you can suggest activities that are relevant to their learning material.