There’s a great article here about how learning takes place. Much of it is based on the work of William Glasser, a psychiatrist whose ideas focused on personal choice, responsibility, and transformation. The long and short of the article is that if learning takes place at the beginning and the end of teaching sessions, then its important to create many beginnings and endings during a longer teaching session.
I think any high school teacher with any experience at all will think that this is old hat. You have to pace your lessons, give your kids breaks without them realizing they’re getting breaks, vary the tempo, etc. It’s certainly not rocket science.