Here’s the article I referenced in the video:
Johnson, H. L., Dunlap, J., Verma, G., McClintock, E., Debay, D., & Bourdeaux, B. (2019). Video based teaching playgrounds: Designing online learning opportunities to foster professional noticing of teaching practices. Tech Trends. 63(2), 160-169. https://doi.org/10.1007/s11528-018-0286-5 DOWNLOAD
Here are two more articles:
Dunlap, J. C., Verma, G., & Johnson, H. L. (2016). Presence+Experience: A framework for the purposeful design of presence in online courses. Tech Trends, 60(2), 145-151. https://doi.org/10.1007/s11528-016-0029-4 DOWNLOAD
Johnson, H. L., Hornbein, P., & Bryson, D. (2016). Designing online playgrounds for learning mathematics. Mathematics Teacher, 110(4), 298-303. Link to abstract. (Full text available to NCTM members)