how do i get my ENTIRE calendar on outlook to sync w/ my iPhone calendar?

When my iPhone syncs my PC, my calendars (I have three of them: one for work, for school, and one for my family and church) don’t sync up. The default Outlook calendar, simply titled “Calendar” in Outlook, is the only one that syncs over to the phone. I’m guessing if all my dates were on the default “Calendar”, then everything would sync over, but I don’t want to do that. Helllllpppppp!!!