My first reaction is to agree wit you, but then I thought about it and how do we know they don&#x27;t? Sure the common wisdom is &quot;teachers suck&quot; and &quot;our education system is out of date&quot; but I haven&#x27;t been in an elementary school math class in 25 years, let alone a majority of them to really have an informed opinion about this.<p>If it really is a problem, an obvious solution is to just supply prepared materials that are based on this to the schools, and that will do a lot to make it available, if indeed it does work as well or better than the current materials.