The Somerville Public Library and Tufts University’s Leonard Carmichael Society are partnering to offer free homework help to Somerville teens. Students needing assistance with math or science assignments can meet with Tufts University student tutors every Monday afternoon from 3 to 5 p.m. in the Library’s Teen Room, at 79 Highland Ave. The program is free for all participating students. For more information, call 617-623-5000 ext. 2936.