ABSTRACT
Due to the global trend and the international application of STEM education as well as in/post-pandemic COVID-19 condition, this ongoing study aims to elucidate the development progress of an online STEM teachers' professional development (STEM-TPD) package with the DECODE model. In this/post-pandemic era, online STEM education has been gradually emphasized. The researchers sustained the rationale for organizing STEM-TPDs to improve teacher practices by enhancing superior knowledge needed for the betterment of STEM implementations. Indeed, the DECODE model includes three stages: (1) DE: teacher's DEmonstrations, (2) CO: students CO-train the use of cloud classroom, students CO-design an educational technology-integrated course, and (3) DE: students CO-teach, eventually students receive feedbacks and DEbrief what they have learned through the stages mentioned above. Moreover, face and content validity have been deployed to guarantee the quality of the developed packages. The ongoing result from this study is produced to validate the online STEM-TPD package with the DECODE model. Moreover, the package comprises manual training, a set of assessments, and an innovative webpage. Through this online DECODE model with the package, teachers are equipped: to familiarize themselves with various software technology and platforms;enhance their knowledge and abilities in assessment design, instructional design, and practical implementation (TPACK);to effectively teach or guide students in STEM activities, and to effectively improve their STEM literacy. © 2022 by the authors;licensee Modestum. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/).