I got an email from a classmate asking for a metric butt-load of my notes. I helped him out once in the past when he missed a lecture for a legit reason. The notes he's asking for this time include a lecture that is available online so even though he missed class he could watch it himself whenever he wants, and the other material is for classes he attended and could have taken notes himself. I'm pretty annoyed because while I'm happy to help people out, he's pretty much asking me to do his work for him.
Should I just ignore the email or should I respond telling him why I'm not going to help him? How do I gently point out that he's being lazy, and should do his own work?