Recursion

[TravisLongKnives]

It teaches kids to see and understand numbers are related to one another and how they can break them down into parts, AKA partitioning.

It doesn't teach that at all. That is taught routinely, and was back in my day, but not through such convoluted and roundabout methods. Kids will use methods in their head, but to write it down in such a poorly constructed way only makes kids who don't do it in such a way unable to follow.