As an instructional designer, I chat a lot with faculty who are developing courses online, or who are popping by for quick ideas (or problem-solving tips) for use in their classroom.
One topic that I don't think is super understood by those who do not have a specific background in education is backward design. Teachers do get from Point A to Point Z, but sometimes I think teachers plan their content and then think about, "Now, how can I test them on what I've taught?" instead of thinking earlier in the process about "How can I test knowledge of the outcomes I was hoping that they would achieve?"
Here's a little graphic about some of the key pieces related to backward design: