It’s thrown around a lot. “You must have high expectations.” “High expectations are the key!” “Keep your expectations through the roof.” But what does it really mean? It seems obvious, but the term has been repeated so often and for so long that its true meaning has been diluted. Or lost altogether. Most teachers have only the vaguest idea. “It just means asking more of your students, right?” “It means communicating what you want, but at a high level.” “It…