>> doing time in boston suffolk county jail is a world away from the colleges or ivy league university located just miles away. but once a week, those two worlds intersect when students from harvard university and boston college come to the jail to help inmates earn their geds. >> they come in and go for us. convicts, i should say. that's a good thing, looking out for us, showing us there is a world out there and there's help out there. people want to help you. >> gerard cohen has been teamed with alexander, a harvard sophomore. >> thing like you can do this in your head probably, but just to be sure because we all make mistake when we try to do it in our head. write it out, it takes an extra five second, but it will be totally worth it. it's taking a test. each answer matters for that final score. people have this wall about how