Our unschooling math comes in bits and pieces.  The oldest kid here, seven year-old No. 1 loves math problems, so math moves along pretty fast for her.  Here’s how she arrived at the distributive property recently.  Tldr; it came about only because she needed it.   “Give me a math problem!” No. 1 asked Mom-person.   “OK, what’s 18 divided by 2?  But, you’re going to have to do it as you walk.  You and Dad need to head out.”   And so, No. 1 and I found ourselves headed out on our mini-adventure with a new math problem to discuss.   One looked at the ceiling of the library lost in thought as we walked.  She glanced down at her fingers for a moment.  “Is it six?”   “I don’t know, let’s see,” I hedged.  “What’s two times six?  Is it eighteen?”   One looked at me hopefully heading back into her mental math.   I needed to visit the restroom before we left, so I hurried her calculation along.  “What’s two times five?”   I got a grin, and anoth...