>>mhb+(OP)
I discovered this site two decades or so ago. I used it to teach my then young son—whose name is, appropriately, Ian—how to tie the fast Ian Knot. My spouse, a kindergarten teacher, used it to learn how to tie student's shoes with Ian's Secure Knot which has been very helpful as kid's shoes with conventional knots tend to come untied on the playground.
It is sad to see that Ian is struggling to fund the site: https://www.fieggen.com/shoelace/support.htm