"First Days of School" section 3

The book to me is starting to get a little bit repetitive. There is one thing that I really cant ever agree with. He says in the book that if you want your students to maximize their learning time you need to add more hours to their learning time. 

I do not really agree with that because I think students will have a breaking point. They will reach a point where they will just shut their brains off and not work. I also do not agree with this because I think you need to maximize your teaching efficiency to help students learn the most. If you are able to reach all your students and teach them a difficult principle in a quick manner than it didn't take them spending more hours to learn it.