I thought the most enlightening information was the "don't make assumptions about what adult students know or understand." I teach college students, and even the most advanced students are still learning. Proofreading is big in my courses, so I make sure I explain an error so my students can understand why and how they made a typo or grammatical error so they can avoid them in the future. I always provide explanation to grades or when students lose points, so they can see where they can improve for the next assesment.
