Steve Garnett authored great guidelines not only for teachers, but for the education materials writers (designers) as well. I wonder why we still don't have evidence pedagogy and andragogy courses at the university and teacher training colleges! I wish I knew these simple rules 14 years ago when I started teaching. However, I followed some of them intuitively. The list of the 14 CLT effects is concise, clear and well delivered. My hat off, Mr Garnett!