SUMMARY
Creativity, mastery of Mandarin vocabulary, and engagement in the classroom are very important from early age to support students’ ability to mastering Mandarin. The purpose of this research is to apply online storytelling methods to improve the abilities of students aged 5-6 years in creativity, mastery of Mandarin vocabulary, and engagement in the classroom. This study used a Classroom Action Research method with preliminary research and three cycles with three meetings for each as a form of corrective action. The subjects of this study were children aged 5-6 years at Maitreyawira School Jakarta. Data collection used data triangulation, assessment rubrics, field notes, and performance results also the assessment was carried out by three observers, which are the researcher and two observers. The results showed that (1) online storytelling methods by providing opportunities to respond the events and critical thinking can increase students’ creativity, (2) online storytelling methods by listening and practicing role-play conversation activity can improve the mastery of Mandarin vocabulary, and (3) online storytelling methods with educator interaction and students can increase students’ engagements in the classroom. For the conclusion, there is an increase in the level of creativity, mastery of Mandarin vocabulary, and engagement in the class of TK B students at Maitreyawira School Jakarta. Suggestions for further research are to pay more attention to children's developments and provide more varied activities