I have often wondered what length of class time is best for high school students. Lutheran High School has 90 minute periods with 4 classes meeting each day. I'm struck by the notion that even the best of teachers who prepare epic lessons might be fighting an uphill battle in engaging this "instant-gratification-lack-of-concentration-please-make-it-visual-and-experiential-or-I-will-be-bored-out-of-my-mind-for-half-your-period-and-oh-by-the-way-I-could-probably-find-a-YouTube-video-that-explained-this-better-than-you-do-anyway" generation of kids (said with all due respect because I love this generation of students).
So maybe a better schedule for more effective teaching exists . . . 45 minute periods? 30 minutes? Every class every day? Class four days a week? What time structure would maximize the strengths and realities of the way these kids think and work!
Then again, maybe it doesn't matter at all - maybe good teachers will excel no matter what and maybe good students will excel in any conditions?
These are things I think about.