The school day starts at 8.40 a.m. and ends at 3.30 p.m. It is divided up as follows: 

Movement bell -  8.37 am
Registration  -         8.40 am
Period 1  -               8.50 am
Period 2  -               9.30 am
Period 3  -               10.10 am
Interval  -              10.50  - 11.05am
Period 4  -               11.05 am
Period 5  -               11.45 am
Lunch  -                 12.25  -  1.30 pm
Movement bell -  1.27 pm
Period 6  -                1.30 pm 
Period 7  -                2.10 pm
Period 8  -                2.50 pm
End of Day  -           3.30 pm

There are 8 periods of 40 minutes each day. This makes a total of 40 periods each week.