What's the Absolute Most Important Thing for Teachers?

Check for understanding is the basis of working out what works in education. If we do nothing else if we never teach teachers in teacher education how to do anything they would derive pretty much every instructional principle from checking for understanding. So that's kind of level one this takeaway that the level two helps us understand why it's really so important. Great quote from Dylan William in a recent podcast is good feedback works towards its own redundancy.