Can you be a Pre-School assistant without a degree?

[Hayley Dominguez]

So I am currently in my first year of College, pursuing a degree in Elementary Education. However, I was looking into maybe trying to get a job as a Pre-School assistant, or even willing to just volunteer at a Pre-School. I live in Arizona and I know it may depend on which state you live in, but would any of you happen to know if I am able to do this in Arizona? What qualifcations would I need if not or so? Thanks for your help.
What exactly are units?

I am CPR certified, and can pass backround checks...