Context: At my school in Grade 12 you get two spares which are free-periods. Since I completed two credits in one class I have a spare in Grade 11.

The spare is in the afternoon, my school as a day 1 (odd days) and a day 2 (even days) so one week my spare would be period 4 (last period) on a Monday, Wednesday, and Friday. This week it is Tuesday and Thursday.

For the other afternoon period I have Online Accounting. The Library (where I usually work on the computers provided) was double booked which means no computers are free. 

I usually find another spot with a singular computer like the Guidance Office. The past 2 days (including today) it is double booked during my account online class. So I went to the Guidance Office to ask if I could use the computers next period, but also asked if I was allowed to "swap" the time slots for the online class and spare from time to time when the library is booked. 

She said since I could access the online class at any time of the day and there is no time slot for it I could. I asked if it'd be unethical to swap the two all the time when I had accounting class period to get off school early. She said no since I can acccess accounting any time and the other period isn't a class, but instead a free period.

**So...** WIBTA if I swapped the time slots to be in my control to leave at 1:20 compared to 2:35 leaving my friend (who I mainly on see at the end of school for the walk home) in the dust every day to well get off early, and is abusing my powers unethical?