Other peoples good ideas
What's Constructionism
I can identify examples (as an existence proof) that constructionism can work for adults as well as children.
Teachers know that if you want to learn a new subject, sign up to teach the new subject. Constructing the course and teaching it to others is a great way of developing that knowledge.
Programmers take on new projects to learn a new method, language, context, or community. My former PhD student, Mike Hewner, wanted to know what professional game development was like. Because he’s an exceptional software engineer, he was able to land himself an internship with a game company one summer (with no prior game experience), explicitly to learn game development.
http://computinged.wordpress.com/2014/05/23/constructionism-for-adults/
Learning Styles and Accessibility
