For Science on eduKateSG, start with the Science Learning Hub. It is the main route into Primary Science, PSLE Science, Secondary Science, and more advanced scientific learning, with links into physical, living, and broader scientific systems.
Choose the next page by level and by the kind of understanding required. Some learners need a clearer model of the topic; others need better evidence reasoning, terminology, experimental thinking, or examination application. The useful route is the one that repairs the actual gap, not simply the page with the most information.
For broader subject navigation, use the eduKateSG Learning Hubs. For evidence, uncertainty, and how knowledge is established, use the Research & Inquiry Hub.