Secrets of Factoring

My dear children, learn your divisibility rules. (Some tricks to sevens on that page that I hadn't known... )

I like the twist on "reverse chaining" that is used in the 9lines system ... and, of course, the presentation is entertaining. The times tables are laid out as three rows of three, and learned sort of from easy to hard. THe very energetic, animated teacher leaps around and inserts amusignly memorable terms for certain positions on the grid tha twill remain constant for all those silly numbers on the times tables. (I, of course, remember not a one of them.) It would make a peachy-weachy podcast. which I will do (really, I mean it this time ;) ) - not for that but applying those principles to, oh, factoring polly gnomials.