Tao
Tao decided to do Khan Academy for maths, and happily worked through a few addition/subtraction stacks. After he giggled at me a few times for taking longer than he had to work out the problems, I told Josh that he could supervise at least Tao's maths from hereon (it won't happen as I've said that a few times from about two thirds of the way through last year, and I'm still supervising everything except when I've asked Josh to supervise due to work). He didn't watch any of the videos as he understood the basics behind the stacks and just needed some assistance with the 4 digit stuff.
Tao's Khan Academy progress report