Online learning is the best learning strategy during the Covid-19 pandemic. However, it has obstacles for students who are still learning to adapt to internet technology. This research aims to determine the effect of using online learning strategies on students' active learning and creative thinking. The subjects of this study were 52 students of the Indonesian Language Education Study Program at the Indonesian Catholic University of Saint Paul. They are taught using the Moodle application. The experimental class was taught using media assistance in the form of WhatsApp, while the control class was not taught. Data collection uses tests and observation sheets. Data analysis used ANOVA with the help of SPSS version 27. The results showed that 1) there were significant differences in student learning activities in online learning with media assistance and students without media assistance; 2) there is no significant difference in creative thinking between students who are taught using media and students who are not given media assistance. Based on the results, findings and conclusions, suggestions will be explained for implementing future learning and further research. Especially the creation of an online learning environment for students who are still adapting to advances in internet technology.