The verbal feedback needed because teachers had to wing it like a standup comedian wouldn't be necessary because each lesson would have been vetted and choosen

The verbal feedback needed because teachers had to wing it like a standup comedian wouldn't be necessary because each lesson would have been vetted and choosen as the best material. Having to slowdown the entire class because you need help helps you but not a percentage of the class. Going quicker for you hurts a different segment. The answer is personalized education.