Teachers and students have experienced an unusual year in 2020 because of the COVID-19 pandemic. To minimize the risk of the epidemic spreading, face-to-face lecturing hours have been reduced, resulting in a substantial need for online instruction. Our project thus aims to develop open access flipped learning resources (e.g. dynamic courseware and instructional videos) for secondary school mathematics teachers and students in Hong Kong. The overarching goal of this study is to make theoretically and empirically supported suggestions for developing the resources. Experiential learning theory was used as the theoretical foundation for developing the resources. A three-cycle recursive instructional design approach involving 34 mathematics educators was used to develop and improve materials that better meet the needs of frontline teachers. Both the qualitative (semi-structured interviews and written feedback) and quantitative (evaluative survey) data collection methods were conducted. The findings of this study reveal the concerns of and requests from our teacher participants, such as providing more detailed guidelines, advanced questions, and interactive quizzes. The findings also reflect the substantial need for open access flipped learning resources in secondary schools. Based on the lessons learned, suggestions are made to inform future development of resources (e.g. inviting retired teachers for assistance). Copyright © 2021 Informa UK Limited, trading as Taylor & Francis Group.
