The document discusses the different structures used in academic texts. It identifies 9 main structures: definition, description, recount of sequence, cause and effect, comparison and contrast, enumeration, problem solution, classification, and thesis evidence. It provides examples of each structure and encourages learning activities where students apply the structures, such as describing a person, making a flow chart on a process, or providing a scenario where the structures could be used in studies. The overall purpose is to instruct readers on identifying and applying different text structures used in academic writing.