What are some good programs to keep track of what my siblings do on a computer.

I want to set up a web filters, choose what programs they can't/can use, I also want to keep track of what websites they go to. I know keyloggers can do that, but I don't know of any safe ones. I just basically want them to use the computer for school and nothing else, no facebook, no games, etc. It would be nice to allow them access to some of these sites once in a while though as a reward for doing what their supposed to be doing. So anyone out there have experience with any of this that can help out? Edit: I'm looking for freeware for the most part that can do this kind of stuff