I'm looking for a comprehensive list of INS-approved schools for
summer english language study.  INS-approved means that the schools
must be able to issue an I-20 form to the student, which is needed for
the student to get an F-1 visa.  The schools must be in the Boston
area, and must have non-academic intensive English programs available
for university-age students.

Your question is about to expire without having been answered, and you
might be disappointed.

A possible reason for that could be your pricing, which might be a bit
low for the type of research requested. Here is a link to guidelines
about pricing your question, in the pricing guide:
https://answers.google.com/answers/pricing.html - I hope this would
help you price your next questions on Google Answers.