High school teacher and college instructor, what's the difference?

In an article about how to move from teaching in K-12 to College Inside Higher Ed cites a commitment to recognizing the unique attributes of adult learning. Treating adult learners like adults is one of the four core assumptions of skillful teaching according to Brookfield (2015).

ThoughtCo. has an article Tips for a Teacher of Adults Students

1. Treat Adults Students Like Adults, Not Kids
2. Be Prepared to Move Fast
3. Be Strictly Flexible
4. Teach Creatively
5. Encourage Personal Growth

Inside Higher Ed is a web-based news source that was founded in 2004 by three executives with expertise in higher education journalism and recruitment. They believed that higher education was evolving quickly and radically, and that the time was right for new models of providing information and career services for professionals in academe.

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Brookfield, S. D. (2015). The skillful teacher: On technique, trust, and responsiveness in the classroom. John Wiley & Sons.