So I am looking to put up some online lectures with powerpoint slideshows. I am just wondering what would be some of the best ways to go about doing that. Basically, I would like to show my slides along with a voiceover lecture on them. I also would like to have the option of showing my face perhaps. I have a 15" MBP Penryn from right before the unibody came out. Any suggestions and help would be greatly appreciated!!!!! Many thanks in advance.