CoLearn is an Indonesian online learning platform dedicated to enhancing students' understanding of Mathematics, Physics, and Chemistry from elementary through high school levels. Launched in August 2020, CoLearn has supported over 4 million students by providing high-quality solution videos and interactive live classes, accessible both for free and through paid subscriptions. Key Features and Functionality: - Live Online Classes: Students participate in two interactive classes per week, led by expert teachers and mentors from top universities. These sessions are designed to make learning engaging and effective. - Comprehensive Learning Materials: Post-class resources include downloadable PDFs and review videos, enabling students to revisit and reinforce their understanding of the material. - Practice Exercises: The platform offers a variety of practice questions in Mathematics, Physics, and Chemistry, complete with detailed explanations, allowing students to learn independently and at their own pace. - Supportive Community: CoLearn fosters a collaborative learning environment where students can engage with peers, share knowledge, and motivate each other, enhancing the overall educational experience. Primary Value and Problem Solved: CoLearn addresses the challenge of making quality STEM education accessible and engaging for Indonesian students. By offering interactive live classes, comprehensive learning materials, and a supportive community, CoLearn empowers students to grasp complex concepts more effectively, thereby improving their academic performance and confidence in STEM subjects. This approach contributes to elevating Indonesia's global education rankings and prepares students for future challenges.