The piece of research reported in this monograph is an evaluative research study concerning post-facto evaluation of an online course on “Understanding Open Educational Resources (OER)” (through the LearnOER Platform) offered globally by the Commonwealth of Learning (COL). The online course has been offered by COL since 2015 through Moodle, but migrated to the new platform in 2018, and out of a total 4,079 registered users from 64 countries, a total of 1,419 participants have successfully completed the course (at the time of the research). OER is part of the COL’s priority area of work facilitated through the Technology-Enabled Learning (TEL) initiative comprising several innovative projects being implemented across institutions globally. The current reporting on the evaluative research focused primarily on evaluating the online course from the point of view of Return on Investment (ROI) / Return on Expectations (ROE) framework. // In what follows is a brief analytical summaries on: challenges to accessing textbooks; open educational resources (OER); need for capacity building on OER; the COL online course on OER; ROI/ROE in online learning; OER and online learning--evaluation criteria/framework; and the objectives of the present evaluative study. The subsequent chapters deal with the following: Chapter 2 (Methodology), Chapter 3 (Analysis of Data and Results), Chapter 4 (Implications for Policy and Practice).