Art Teacher

I am an art teacher looking for a projector strong enough to show images in a small moderately lit room where I teach 3-4 students. The images need not be overly large – 3’x4’ would suffice; 4’x6’ would be plenty. Because I do not want to risk my Mac laptop in the studio I want to be able to put images on a flash drive and plug that into the projector. Could you recommend a relatively inexpensive solution for me?