I wrote a few months back about resources for kids who want to get into programming and mentioned a resource called YOUSRC. I tweet the man behind the curtain, Paul Clarke (@YOUSRC) on a fairly regular basis and after a conversation about Bresenham’s Incremental Line Algorithm (a fast way to plot any line without using floating point arithmetic) in response to a game he’d written on the site (Missile Command), I thought I’d have a …