This study examined the design of a computer-supported environment using online discussion for alignment of learning, collaboration and assessment. Participants were 155 student teachers attending a course in psychology of classroom learning in a teacher education program in Hong Kong. The design included students contributing to online forum; engaging in regular discussion; and reflecting on their discourse. For reflective assessment, student teachers identified three best examples (clusters of notes) from the class community’s discourse and explained why they were important for their inquiry. Data consisted of questionnaires on epistemic beliefs and collaboration; students’ postings on online forum; reflective assessment notes (3 best clusters of notes); and end-of-term theory-practice summary paper. Correlation analysis show that students’ beliefs about collaboration was related to their beliefs about knowledge (development); as well, regression analysis indicate that reflective assessment scores significantly predict summary paper (domain understanding). Implications of examining both individual and community learning through reflective assessment in computer-supported environments are discussed. Copyright © 2018 EARLI.