Incidental correlation is a natural correlation that occurs when coordinating topics between science and other subjects to provide a broad treatment of the subject and highlight similarities. It relies on the teacher's wide knowledge and versatility. Correlating science with other fields can greatly enrich students' learning experiences by helping them understand how subjects in the curriculum are interrelated and supplementary. Correlation makes use of the principle of apperception to promote understanding, memory, and interest by helping students assimilate new knowledge into a well-ordered system rather than thinking of knowledge as isolated facts.