Actually there is no evidence that charter schools provide a better learning environment, or perform better than public schools.

There IS evidence that public schools suffer when a charter school is opened, and "creams" off the higher income, engaged families. The kids that need help the most help, low income, language challenges, and unengaged parents don't even get a chance because the families are often not even aware of the charter school option.

There is something called a "Horace Mann Charter" which is a charter school that is part of the existing school district. I think this might be a really good option to consider for Somerville.