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# John Moser

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### Calculus AB Content: Add a video exploring the sinc() function and its uses

In the Calculus AB course, Limits and Continuity, there is a video on limit of sin(x)/x. This is an important function, called the sinc() function.  It would be nice to add a separate video discuss...

• John Moser commented,

It's a technically-correct analogy and helps people understand subtle psychological impacts of the type of feedback given which is non-obvious. I often liken things that are weaponizable to the wea...

• John Moser commented,

Removing all the skill level changes and other information, to me, caused a serious drop in interest.  I don't feel excited about practicing; it's now a chore.  It just says "blah, you practiced." ...

• John Moser commented,

I've thought about this more, and considered a rough curriculum for absolute early math—the earliest, learning counting and basic arithmetic.  Roughly: First introduction to Counting is a brief e...

• John Moser commented,

Think about these numbers:  2.00 and 0.04     The problem is merely 2 / 4. 4 isn't a factor of 2; the next digit is 0, thus 20 / 4.  We know that's 5 (multiplication table). The 2 was two columns l...

• John Moser commented,

Sure, but how well can you do it?  Single-digit addition? How about keeping up with third graders?  There's a video out there of kids playing word games while paying little attention to the computa...

• John Moser created a post,

### Use anzan and other high-tech math methods

Khan Academy should use higher-tech mathematics methods, such as soroban and anzan math for basic arithmetic.  That includes rapid, registered addition (soroban uses the same operation to compute e...

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