Effectiveness of using online platforms as a substitute for face-to-face learning in learning chemistry on colloid topic

This study aims to explore the effectiveness of using online platforms in learning chemistry on the colloid topic during the period of distance learning activities due to the COVID-19 outbreak in Indonesia. The online platforms used in this study are Skype, Zoom, Quizizz, and Google Drive. The use of the platforms was done gradually to see the student's development in understanding the learning material. Two aspects determined the effectiveness of using online platforms in learning chemistry. First, students' online questionnaire was deepened by interviews through the WhatsApp group, and second, based on students' concept test results, which refers to the essential competencies of learning chemistry in Indonesian curriculum documents. This research employed action research so that evaluation and improvement occur in learning. Data collected through the questionnaire, online interviews, and test score concepts. Based on the results, Zoom is considered as the most effective platform in learning chemistry on the colloid topic. This research has an impact on the development of technological knowledge of the teacher who is forced to master several platforms that they never used before.