I just got an email from the principal at one of the schools that I'll be working at! I sent emails to both of the schools about a week ago, but since all schools are on vacation, I didn't expect to hear anything back until the end of August.
He said that they're very happy to have an assistant, especially since they haven't had one in a few years. The school was built in 1992 (a lot newer than the other school where I'll be working), and has about 800 students from ages 11 to 16 (grades 6 through 9).
The main city that I'll be working in has about 20,000 residents, and the other village is just beside the main one, but is much smaller.