The document discusses the definition and types of curriculum. It provides multiple definitions of curriculum from different perspectives, including the overt or written curriculum, the planned experiences for learners, and everything that happens within a school. The types of curriculum discussed include child-centered, society-centered, knowledge-centered, and eclectic approaches, as well as perspectives aligned with different learning theories and philosophical orientations. The document concludes that American curriculum is difficult to define because it is layered and eclectic, encompassing both planned and unplanned lessons learned from all aspects of the school environment.