Slideshare.net is a file sharing website for powerpoint presentations. I have, over the years, uploaded several powerpoints to this website and they are available to you free of charge.

Simply download them and use them as you need.

After seeing a report that almost 100,000 people had viewed these presentations and over 1,000 had downloaded them, I realized that I had probably never mentioned them here on this blog so, to make up for that, here the links for you to have a look and download if you feel that they might be of use to you.