I couldn't resist; I sent her a response.
Hi Mrs. X -
I just wanted to say that I really liked your comment in the weekly newsletter about letting the kids choose their preferred method of addition. I know Common Core gets a lot of flack for doing things differently, but to me your statement really gets to the meat of it. Giving the kids options and then letting them use what works for them is how I try and run my high school classroom, so I love seeing it at the elementary level too!
I just wish that other parents understood that the way they learned something in school isn't necessarily the best way.
I'll step off my soapbox now. Just wanted to say thanks! :)