The University has negotiated special rates with many local hotels. Please see following website for details: http://www.campustravel.com/university/tufts/. (Hyatt Place Medford provides a shuttle to campus).
On-campus accommodations are available during the summer months through Tufts University Conference and Event Services. These rooms are intended as a low cost option for those who are traveling on a limited budget. Individual guests can reserve and pay for rooms online directly from Conference and Event Services.
Check out their website for information on available rooms: http://conferences.tufts.edu/accommodations
If anyone is renting a dorm room they must be accompanied by an adult if they are under 18!