The document discusses the three components of any curriculum: the written/intended curriculum, enacted curriculum, and received curriculum. The written curriculum refers to what is formally adopted, while the enacted curriculum is what is actually taught in practice based on a teacher's decisions. The received curriculum is what students ultimately learn through their experiences with the intended and enacted curriculums. Additionally, the document outlines several factors that influence how curriculum is enacted, including policy makers, curriculum materials, school factors, community factors, and teacher factors.