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https://jondron.ca/learning-in-an-introductory-physics-mooc-all-cohorts-learn-equally-including-an-on-campus-class-colvin-the-international-review-of-research-in-open-and-distance-learning/
Learning in an introductory physics MOOC: All cohorts learn equally, including an on-campus class | Colvin | The International Review of Research in Open and Distance Learning