I really wouldn’t pay too much attention to those school rating sites that assign numbers to schools. They tend to be heavily based on standardized test scores, which means they are essentially just a proxy for the wealth of a town.

Remember that MA has the best public schools in the US. Even an “average” or above average school district in MA is quite good by US standards.

The other reality is that even in towns with a big income range (and therefore lower average standardized test scores), the middle and higher income kids still have good outcomes. It’s the lower income kids that unfortunately tend to be more likely to struggle, in large part due to reasons outside of school.