Academic System ERD models a complete student enrollment and grading database with six core entities: ESTUDIANTES, PROFESORES, MATERIAS, GRUPOS, MATRICULAS, and CALIFICACIONES. Data flows from professors and courses into groups, then students enroll via matriculas, generating calificaciones records linked back to enrollment. This normalized schema eliminates redundancy, enforces referential integrity through foreign keys, and supports complex queries on student performance, course load, and instructor assignments. Fork this diagram on Diagrams.so to customize for your institution's specific requirements, add additional attributes, or export as .drawio for use in database design tools. The one-to-many relationships between grupos and matriculas, and matriculas and calificaciones, reflect real-world academic workflows where one class section enrolls many students and each enrollment generates multiple grade records.