I'm primary so not familiar with controlled assessment, but I'm under the impression that in said lesson they were doing some kind of test? And the criticism was that there was no teaching going on? Surely to teach whilst they're doing a test defies the objective of doing the test......?! I think NQT obs should be planned in so you can make sure you ARE teaching when it is done - it shouldn't be just "dropped in" esp if there are assessments going on at the time as it's not a fair reflection of your teaching! This def sounds a bit dodgy to me.