[gwoplock]

When I was in high school, IIRC we did 55 minute classes with 5 minutes between classes, 4 core classes 2 or 3 electives + lunch. It doesn't work, by time you start, the class settles, late arrivals show up, homework is collected, questions asked and whatnot, there's probably only 30 mins of real instruction. Class would boil down to either teaching or worksheets but not both.

[pwthornton]

Yes, this is the rub, it's not very efficient. For deeper activities, block scheduling is radically superior. Hell gym is way better too!

[kneebonian]

So my school did block schedule of 90 minutes classes on alternating days. But I am wondering if 30 minutes of instruction is about right?

I mean a lot of evidence point to people having difficulty focusing on a single thing or learning for more than 20 minutes at a time? 30 minute bite-sized lessons might be perfect.