Study Tracker Chen is a normalized relational database schema for managing user study sessions, focus metrics, and learning analytics. The ER diagram models five core entities—USER, SUBJECT, STUDY_SESSION, FOCUS_LOG, and ANALYTICS_REPORT—connected through four relationships: users register for subjects, attend study sessions, generate focus logs during sessions, and view personalized analytics reports. This schema captures essential attributes including user profiles, session timestamps, real-time distraction levels, and derived metrics like productivity scores and mastery growth. Fork this diagram on Diagrams.so to customize entity attributes, add constraints, or extend relationships for your learning management platform. The design demonstrates best practices in entity normalization and cardinality modeling for educational data.