Can I get a teaching job with an expunged crime in Oklahoma?

I'm in college now and it's my dream to teach 5th graders. I don't want to waste all my time on getting a degree if I'll never be able to use it. I was arrested for possession of a controlled substance (mushrooms). I got a deferred sentence for 5 years and at the end of it, barring any more mess-ups on my part, it'll all be expunged. So will it still show up when I apply to become a teacher?