Broadly speaking, all activities that enhance people's knowledge and skills and affect people's ideology and morality are education. Education in a narrow sense mainly refers to school education, which means that educators exert purposeful, planned and organized influence on the body and mind of the educated according to the requirements of a certain society (or class) and cultivate them into people needed by a certain society (or class). Types include formal education, adult education, technical education, special education and lifelong education.