Leon, I'm all for further learning, but I oppose the giving of credit for it. I choose not to give extra credit. Good students may want to do additional assignment or even a project that is not required. While that is admirable, doing it for cresit sets the wrong example for preparing the students for the work setting. We don't get extra credit at work for doing a good job, although we may be evaluated on how our work measures up to expectations. So if something helps students learns that is beyond normal expectations, I allow that, but not for credit, but the sake of their learning. Barry Westling