Have just completed a very interesting online course about US constitutional concepts, how it has been developed and different perspectives of its content and interpretations in regards to law.
Professor Kermit Roosevelt provides several controversial points of view on constitutional topics with judges decisions and history in regards to it. In the context of contemporary chatter about freedom, democracy etc. this course should be able to help making an informed opinion based on existing knowledge and research up to date.
The course is provided by University of Pennsylvania, in my opinion it's one of the best universities in the area of free online (MOOC) education so far.