refrain from blatant self promotion when teaching

One of my latest projects is presenting classes to the local Community Education Classes. I've just finished a 10 week Marketing Boot Camp course to owners of small to medium sized businesses. One of my Community Ed supervisors was concerned that instructors may overstep the line as to presenting "generic" information to students or in promoting his/her business while teaching a class. Here is a note I sent to her offering my side of things:
I was reminded this morning of something you stated when we met the other day about having the best interest of the student over the interests of the instructor. As I was reading a book this morning, written by a mentor and colleague, I was reminded that I share his feelings. Speaking about when presenting radio interviews (but I think it’s appropriate with teaching as well) he wrote:
Most experts tell you “Plug your product or service when on the air.” I disagree. People don’t want to hear about your book or video or accounting firm; they want to get solutions to their most pressing problems. So rather than talk about you, your product, your service, or what you know, focus on the listeners- what they need, what they want, what their problems and concerns are.
I’ve been an instructor and sales person for many years and I’ve always lived by this philosophy. Because my marketing Boot Camp class had to do with marketing; which is what I do, using my examples of marketing pieces and those from my clients may have had the appearance of promoting my services. Certainly I will refrain from blatant self promotion when teaching.  
Thanks again for all. Make it a great day!
Ter
“Terrific. Energizing. Results!”