So I was going to head straight into part two, on mixability in the mOOC. But I realized I needed to outline how mixability of OER stands now, at least when used in a traditional institutional context.
The answer, in short, is using OER today is like trying to compose emails to people using only clauses found in the work of Henry James. Or language from any other defined corpus. While the clauses may be quality, the time cost finding those them and integrating them to tell a coherent story far exceeds any value those clauses bring to the equation. The problem, in other words, is integration cost. The video below explains how this works in a typical example an instructor might face.