In secular usage, religious education is the teaching of a particular religion (although in England the term religious instruction would refer to the teaching of a particular religion, with religious education referring to teaching about religions in general) and its varied aspects: its beliefs, doctrines, rituals, customs, rites, and personal roles. In Western and secular culture, religious education implies a type of education which is largely separate from academia, and which (generally) regards religious belief as a fundamental tenet and operating modality, as well as a prerequisite for attendance.
The secular concept is substantially different from societies that adhere to religious law, wherein "religious education" connotes the dominant academic study, and in typically religious terms, teaches doctrines which define social customs as "laws" and the violations thereof as "crimes", or else misdemeanors requiring punitive correction.
Since people within a given country often hold varying religious and non-religious beliefs, government-sponsored religious education can be a source of conflict. Countries vary widely in whether religious education is allowed in government-run schools (often called "public schools"). Those that allow it also vary in the type of education provided.
People oppose religious education in public schools on various grounds. One is that it constitutes a state sponsorship or establishment of whatever religious beliefs are taught. Others argue that if a particular religion is taught in school, children who do not belong to that religion will either feel pressure to conform or be excluded from their peers. Proponents argue that religious beliefs have historically socialized people's behavior and morality. They feel that teaching religion in school is important to encourage children to be responsible, spiritually sound adults.