You might consider another film. I teach school and do a lot of photography in class without flash. I use HP5+ and rate it at EI 650. If HP5+ is not your cup 'o tea, Tri-X will work well too.(posted 8698 days ago)Personally I wouldn't mess with the 3200 films unless the lighting is very, very low. ISO 400 films are really able to do a lot with available light, and I've found that pushing them is better than dealing with the added grain of faster films.
good luck,
chuck k