10-Period Schedule

My focus schools will each have a 10-period schedule. Here are possible times based on my 8-period schedule:

8:30-9:45 – 1^st

9:50-11:05 – 2^nd

11:10-12:15 – 3^rd

12:30-1:05 – lunch

1:10-2:35 – 4^th

2:40-3:55 – 5^th

4:00-5:00 – study hall

I'd simply have to add an extra class on Fridays to make the Friday schedule comparable to my 8-period schedule.