STEM Ed: Digital Classroom Discussions (IMAGE) Michigan Technological University Caption The shape of conversations switches from a 'messy map' with multiple replies and cross-discussion between members to a centralized, hub-and-spoke discussion where the presenter is a key figure. Credit Jackie Johnson/Michigan Tech Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.