I know that Laz doesn't like us (for good reason) to put sites in our blog, whether our own off-site blog or something that we've discovered... Still I just remembered that I've an account at Kahn Academy. I'll only say this, that so far as I've been able to discover this site is entirely free, and one of the better sites for learning anything you want to learn. And frankly I want to learn something, anything that can move me from working part time running a string trimmer. Not mind that I dislike the string trimmer. But part time? That isn't working for me. I'm going to be homeless if I don't change something, and it seems that running a string trimmer is about the extent of what I can get for work currently.