Sounds great
If you get stuck you know where to turn to. I don't like meaningless assessment either. Countless educators are happy to see small percentage improvement but don't know real learning only happens when the students go home and read on and even study topics that aren't covered, out of self interest. You can't find normalized gain if student understands topics not even taught. The gain would be infinity. That is what teaching should be. To motivate. Not to shower a bunch of knowledge points and see the percentage that are retained.