A personal learning network (PLN) such as this board, is a great resource for computer science teachers who may be fairly isolated in their individual school. Here there are great resources for middle school and high school teachers of computer science. With the movement to provide computer science for all K-12, the elementary school teacher of computer science needs support too. This board would be more useful if there was the ability to tag questions as k-5 and/or k-8. As a new user, I don't have the ability to add new tags. This discourages asking questions that don't fit with the existing tag topology because the focus to date has been in the secondary arena.
This has come up before. You may want to see the discussion here. There were concerns with the grade numbers being US-centric, and we wound up with the tags primary-school, high-school, and undergraduate. (The graduate tag referenced in the top post there was never used, though adult-education did eventually appear.)
high-school has been, by far, our most popular age-related tag, followed by undergraduate. I think this stems largely from the demographics of our earliest adopters. But we're a welcoming bunch, and this is a great community. We would love to have more primary-school discussions going on.
One problem we have with tags is that there are a lot of them and for a new user it isn't obvious that there is one that applies. I didn't know about primary-school myself and wouldn't have been likely to find it in a search while writing a question.
Note that a search in tags seems to only search on the tag names, not their text. So, you basically have to look at them all or you have to know something about the name itself to find a given tag.