Should What (fun) results in graph theory should undergraduates learn? be reopened? In the comments, Andrej Bauer suggests that it is should be moved to Math Educators Stack Exchange, while Fedor Petrov thinks it is on-topic here. Personally, I voted to reopen, since the question provides some context (location=UK, level=3rd year), and how it differs from the similar teaching question Interesting and Accessible Topics in Graph Theory (which was not closed). I also agree with Fedor Petrov that a teaching question should not automatically be closed for not being research level. Otherwise, why do we even have a teaching tag? Admittedly, this question is a bit soft (even for a teaching question), but not worthy of deletion in my opinion.