Roughly translated 

"Perhaps it would be a  fun idea to have a minimal number of words when making homework. This way homework can be graded more easily and checked better. Giving feedback will become easier. Now I have sometimes have to come up with feedback for a person who wrote only 2 sentences of homework and should be getting an outstanding since in principle, it answered all points. It's a bit unfair comparing to those who do put in a lot of effort to get an outstanding "  

What Maia said, I dont see the purpose of colours. other than that it sounds like a good idea! though I believe you mean Potioneer instead of alchemist.

Once in a while. that could be once a year or once every 6 months, the suggestion for once a month was denied and even that isnt that often.