This is just a quick bit offering some definitions from edX. Modular learning is "unbundling the traditional learning 'packages' - Associate’s, Bachelor’s, and Master’s degrees - into more manageable learning chunks that are also tied to real career and life outcomes." And stackable learning is "when you take certificates and credentials that you earn in edX programs and 'stack' them together to form a larger credential or degree." The article doesn't come close to delivering on the second part of the headline. After all, the traditional learning 'packages' are already unbundled - we used to call the unbundled bits courses. What would really be transformative is being able to take courses from multiple institutions. Ah but edX wants you to stay loyal to edX.