In this paper, a model for theory-based process evaluation in online learning is suggested and discussed in relation to its potential as a tool to reveal strengths and weaknesses in a current course design in a fully online course in Educational Science Education. The suggested focal points in the evaluation plan at this stage of the process are based on sociocultural outlooks on learning and guided by theory-based process evaluation theory. The evaluation model will be tested for the first time in autumn 2019.