The Research Data Management and Sharing MOOC is a collaboration between the EDINA/University of Edinburgh Data Library team (which has been maintaining the MANTRA Research Data Management OER for a number of years), and the University of North Carolina. MANTRA is a web-based OER developed using the Xerte open source course authoring platform while the Research Data Management and Sharing course is being created on Coursera. I will discuss the pros and cons of the two platforms. Using Coursera will allow us to provide certification for the many users who have contacted us over the years to request it. Using a new system does involve a learning curve. However, Coursera has proven quicker to learn than Xerte, and consequently should be easier to maintain in the long run.