Jay Sawyer of Glenview, IL notes that answering this question requires an understanding of – Which parts of the current four-year model can be substituted?; Which parts can be supplemented?; and Which parts are complemented by digital technologies? According to Jay Sawyer, by freeing resources from courses that can be commoditized, colleges would have more resources for research-based teaching, personalized problem solving, and mentorship. The students would also have more resources at their disposal because they would not have to reside and devote four full years at campuses.