Although formal adult learning theory has been around since before the 1920s, Malcolm Knowles published the first work on andragogy in 1970. It had 5 main points. In order to learn, adults:
1. Need to know why they need to learn it. This means that you need to find out why they are there and what they want to learn. If they don't know or if their objectives don't align with yours then it's worth taking a minute to help them figure out what they can get out of the course OR to convince them that your learning objectives will fit their needs OR to negotiate a little on what you are going to cover. But you can only do this if you know why they are here in the first place
2. Build on their prior experience. This is called "scaffolding" meaning that adults will absorb information only if they can attach it to something that they already know. It can be very difficult to overcome a misconception that an adult already has...Ellipses example
http://www.ted.com/talks/jonathan_drori_on_what_we_think_we_know.htmlYou hae to be able to confront the misconception head on in order to overcome it.
Regardless, the point is that you need to know what your students think--there has to be back and forth.
3. Need to have agency. Adults need to be responsible for their own learning. This may mean some negotiation over subject order, subject coverage. This may be advantageous to you because you can tap into the desire to be self-determined learners by providing them with sources and then telling them to go at it.
4. Learn just in time. We are all busy and we all prioritize...you learn what you need to know right before you use it.
5. Problem-based learning. Apply it to real life