I'm cutting some limes in half then quartering the halves when Nevan (my 8 year old) walks up, watches for a moment and says:
8 slices per lime.
Oh yeah? I just cut 4 limes, so how many slices are there?
36, huh? How'd you come up with that?
8 and 8 is 16 and 16 times two is...no wait, 34. There's 34 slices.
Alright, explain that one then.
*Begins using finger and countertop as if it's chalk and slate*
No, no, no. It's 32. 32 slices.
Well it has to be even.
*teachable moment antennae go up*
Oh? Why even?
16 plus 16 has to be even because an even plus an even is an even.
Yeah. Even plus even is even and odd plus odd is even too. For example, 8 plus 8 is 16. Even. And 7 plus 7 is 14. Even.
So how do we get an odd?
We get those by adding an even plus an odd.
Yeah, lemme show you.
*And he does*
You know, this is just too easy. Math is all over the place around here. I'm a big fan of WCYDWT and all, but I've always struggled with running into a great problem that fits something I have to teach. But since we've decided to take over the education of our children, I don't care what fits. If it's interesting, we're talking about it.
The best part of this is that I don't even have to bring in pictures of hot dogs and buns in order to teach LCM. I can actually have that conversation with my son in the grocery store on July 3 because we really don't want to have food go to waste.
That's it! I'm homeschooling my students next year.