Hello. If you are a returning visitor, you may notice a slightly different look for MrKersey.Org. That's because I have made some significant changes to the site recently. Most notably, I have switched to Habari as the main platform for delivering content. Much of the old information on this site, such as lecture notes, stuff for teachers, etc., is still here and available. It's just not obvious at the moment.

Over the coming days I will be working to improve the site and make things a bit easier to find. Until then, thanks for your patience.