The phrase "hidden curriculum" was coined by Philip Jackson in his 1968 book entitled Life in Classrooms, in a section about the need for students to master the institutional expectations of school.[3] Snyder develops this with observations of particular institutions.[4] Snyder then addresses the question of why students — even or especially the most gifted — turn away from education. Even honest efforts to enrich curricula frequently fail, says Snyder, thanks to the importance of the tacit and unwritten understanding. He says that while some students do not realize there is a disjunction between the two curricula, in a demanding environment, students develop strategies to cope with the requirements they face.[4]