It's hard to tell from your post whether you're teaching in a different district from where you teach, but I think that you'll ruin a lot of opportunities by resigning.
The summer school principal will be scrambling to fill your vacancy and will probably make an unhappy phone call to your current principal.
Before you resign, you might want to talk to your principal to get some advice (or a trusted administrator) and talk to the summer school principal to explain why you're unhappy in your post. Definately talk to the summer school principal and give that person a chance to understand why you're unhappy and a chance to fix things for you.
If it were me, I'd take a deep breath and stick it out for the next six weeks or so. Imagine all the fun things you're going to do with the bump in pay and reward yourself for sticking it out.
Believe me, I know how it is. The first time I taught summer school, I had 40 kids who had failed junior English. I was in a building that was not my home turf and the classroom wasn't built for 40 kids. Did I mention rival gangs? Yep. I put one group's members to the left, the other group to the right, and the girls who had been pregnant during the school year down the center. Not ideal conditions at all!