In the latest class, 1/3 will go directly into IPTs, 1/3 will observe the IPT sessions for 2 weeeks, and 1/3 will go home for 2 weeks, then come back to Dayton to observe for 2 weeks before finally starting the IPTs.
This could be different for the next classes, depending on how they are split up for initial aircraft training (200 vs 701/900).