My high school was mostly like this. "Block-8" scheduling was utilized, which resulted in four, roughly ninety minute classes per day, with our days alternating

My high school was mostly like this. "Block-8" scheduling was utilized, which resulted in four, roughly ninety minute classes per day, with our days alternating between an "A" and a "B". This provided for 8 classes per semester. Classes were typically broken up into 30-45 minutes of lecture and the remaining time for group work or individual study.