Thread: Everyman Sleep Cycle with School. Schedule Help?

Hello :3
I was thinking of attempting a polyphasic sleep schedule for my junior year in high school. I'm taking 5 AP classes, one of them being an art class. Having extra time to work on things seems like it'd be very helpful. Since summer has started I thought trying this out while I'm free to be lazy and tired would be a good idea XD
Now, my school runs for 7 hours, and I need about twenty minutes before and after school to get ready and get home. I would like to try to avoid taking a nap at any time during the school day, but the gap is pretty long. I thought maybe the Everyman 4 schedule would work better and have arranged the following:

Core 2:40am-7:10am
Awake ~8hrs
Nap 3:10pm (estimated time, whenever I get home from school)-3:30pm
Awake ~4.5hrs
Nap 9:00pm-9:20pm
Awake ~5hrs
Total Sleep Time: 5hrs10min

This is my first time attempting a polyphasic sleep cycle so I wanted to make sure this schedule would be okay :/ If I have to get a nap in school time it'd take up my entire lunch period so I'm just trying to avoid that.
Also, once I decide to start attempting the sleep schedule (it may be in a bit, I'm kind of sick and mentally dying right now DX), does it matter if I start with a nap, or do I have to stay up until my core sleep time and start there? That sounds like a noob question, sorry ;~;

Thanks~