I would think there is a chance... you could find a route in. Let's face it: sub teaching is in demand, so I would think they'll open the door GLADLY to a person who looks the part, even with 2x DUIs. Once you're in, then it is all about proving yourself I would think. If in doing your job, you get positively noticed, it would lead to them wanting to hire you. And at that point, the P potentially wouldn't even look at your appliation (i.e. transcripts, criminal history).