Let's lighten the mood. It's towards the end of the week and I want to hear about something not related to politics. It's 2019 and we just went up another number. This has me thinking about numbers in general. Tell me about a number that is significant to you. Maybe it's a number that always shows up in your life, or it's a number that is lucky, or you just like the number because of the way it looks or sounds. It could even be a fact about a number you learned on this site. Let's dig deep and talk about numbers.
Looking for some advice given by commenters on MetaFilter (pretty sure it was the blue) about maths teaching. The advice wasn't specifically requested itself, just a response to the subject of the post—presumably maths education related somehow, though I've searched through a bunch of threads and haven't found them. Perhaps someone has the comments favourited and will know what I'm referring to. [more inside]