No, it is 6 hour blocks. But after 3 weeks of 2 subjects. They switch to another 2 subjects for 3 weeks. Then switch back to the original 2 subjects. And then back again. So back and forth between 2 sets of 2 subjects. 6 hour classes, one subject per day. Except Wed where everyone is online and they get both subjects. So that would be 3 hour block. M, T, Th and Fr are 6 hour classes. This goes on for a 15 week term. Then another term starts with 4 more subjects. Then a 6 week term at the end with 2 subjects.
