I think you missed the entire point. Someone could have demoed this on an i386, it doesn't mean implementing it on ARM is a novel, patentable invention.
Looking at some other explanations from this site, it seems like it suffers from the same things people complained about with Khan: a lack of rigour, and oversimplification. They have some good visuals and metaphors, but ultimately the 'plain' explanations of mathematical properties are a poor foundation for someone to build upon when they get to higher concepts.
But the point of this site is seemingly "understanding", not an algorithm - see the title of the page ("right, not rote"). However, what they really seem to be doing is breaking down what should be an intuitive process - understanding equalities and how to work with them - into several smaller, vague sub-processes which also aren't really easy to understand. I would argue that explanations like this might hurt someone's chances of understanding concepts like systems of equations later on.
I don't really understand this view of therapy. In my experience, it's something you choose for yourself, because you recognize the need. The odds that you receive a psychiatric evaluation against your will and be compelled into therapy are amazingly slim. Especially for something like 'autism-spectrum' disorders, where the majority of sufferers appear to be high-functioning.
edit: Jeez, I get it. HN doesn't like puns