Westville is part of the City of New Haven, so your children will be attending schools there unless you are willing to pay for private. Like any large city, the schools in New Haven have issues. Some schools are good and some are not. New Haven schools perform significantly under the state average on the Connecticut Mastery and Connecticut Academic Performance tests. There are some excellent magnet schools which are state funded specialized schools, but they can be difficult to get into (not everyone is accepted).
West Haven schools perform better on the Connecticut Mastery and Connecticut Academic Performance tests, but they are still below the state averages. Class sizes also appear to be a bit high with over 22 students or more per class. For more information, check the link below for more information on school districts.
Strategic School Profiles by District
If schools are important, you might want to consider Milford which is located just west of West Haven. Good luck, Jay