ADPi is particularly "PC" when it comes to new members, so I imagine it was pretty different from your usual fraternity pledge period. For one, we don't call them pledges; they're "alphas." And after initiation, we're not actives, we're "deltas."
We go to chapter with everyone else, but they bring us in after the opening ritual and we leave before the closing ritual.
After chapter, we have Alpha Education. We order our pins and a bunch of other stuff (I remember bringing a LOT of checks to alpha ed), learn the history and symbols and all that good stuff, and prepare for the initiation exam. I do recall some homework assignments.
At some point, we get "diamond sisters" (bigs or moms or whatever) who are supposed to guide us through the new member period. Apparently, the older girls are supposed to drive the younger ones to chapter and decorate their doors after bid day and again right before initiation. I never got any of this because I lived off campus and my diamond sis never went to chapter.
Initiation was 6 weeks after we became Alphas, but New Delta Education continued through the whole year. We had our New Delta retreat in late April, I believe.
The only down side to this is I never felt like I earned my initiation. It was sort of just handed to me.