The document discusses the concept of hidden curriculum, which refers to the unstated lessons, values, and perspectives that students learn in school. It is defined as the informal and often unintended lessons learned from factors like social structures, teacher behavior, rules, and cultural expectations in the school environment. Some key aspects that contribute to the hidden curriculum are peer pressure, cultural values promoted by the school, curricular topics, teaching strategies, and institutional rules. The hidden curriculum can positively or negatively influence students' development depending on the messages communicated.