The movement toward open education is requiring educators to expand and update their practice in order to keep up with the new demands being placed on them. This study explored how educators can engage in meaningful learning opportunities, which will facilitate the creation of expertise and knowledge, through the use of open education resources (OER). The article describes the design of the instrument employed to measure workplace learning through OER activity of adult educators (n = 522) and to report its internal reliability and convergent validity. Results indicate engagement with OER promote three levels of learning, each connected to the different types of knowledge educators require to integrate OER into their teaching practice.