Omnipresent First Grade Teacher

I sent an email to Ki's classmates and invited them to her party. Evidently one of the two teachers are also on the email group. Her teacher, Ms M, said she lived near by and would try and stop by. But she didn't tell the kids, incase she couldn't make it. Sure enough, she showed up and stayed just long enough to say a quick hello and take the caramel apple I forced on her. Ki stood by the gate and watched her leave, sending her off with a wave and a look of amazement.
Later I asked Ki, "That was pretty cool that Ms. M came over."
"Yeah! But, Mommy, how did she know there was a party and where we lived?"
I couldn't resist adding to the mystique of a first grade teacher. "Well, she is a very smart teacher. She knows ALL KINDS of things."
Ki paused, "Like she knows where all the kids in our class live?"
"Yeah, I guess she does."