Block scheduling

My school has block scheduling. Which means we have 4 classes (each an hour and half long) per day. Lunch is still only 4o min though.
Its goes like this:
1st block 8:05-9:30
2nd block 9:35-11:00
3rd block 11:05-11:45
4th block 11:50-12:30
5th block 12:35- 1:15
6th block 1:20-2:45

3rd-5th blocks are the lunch periods. So for me it goes like this:
1st block spanish 2
2nd block Lit
3rd block lunch
4th block History
5th block the rest of History
6th block chemistry