Nine classes a day would hurt my brain. Over here, there is a max of 4 periods - but each class goes for two hours.

My schedule is complicated because each day my classes are different.

Monday: Political and Legal Studies, Human Bio and Early Childhood Studies (Period 2, 3 and 4).
Tuesday: English 2A & 2B (Like advanced English) and Digital Media (Period 1 and 3).
Wednesday: History, Human Biology and English (Period 1, 2 and 4).
Thursday: Political and Legal Studies and Early Childhood (Period 1 and 2).
Friday: Digital Media and History (Period 1 and 2).

I sit through 12 classes a week - each class is 2 hours long. I'm glad I only have 1 more year of school left.