教学相长

Explanation: Both teaching and learning and the promotion of mutual influence, have been improved. 　　Usage: The main predicate; as predicate, object, attribute; that teaching and learning and promote each other 　　Source: Han Dai Holy "Book of Rites Record of Learning": "Therefore in school and know enough to teach and know the difficulties. Know enough, and can be reflexive also, known difficulties, and can be self as well. Hence it is both teaching and learning also." 　　Examples: Teaching practice, so I deeply understand ~ the truth. Thesaurus:  Hujiaohuxue