The document discusses checklists, which are lists that allow the recorder to note the presence or absence of items. Checklists record facts rather than judgements on a scale. They are useful for observations and evaluations as they systematize the recording process and ensure completeness. When constructing a checklist, the purpose must be clear and items should be logically organized into categories. Checklists can take various forms like lists, true/false questions, statements to check, or multiple choice items. They are a simple but effective tool for data collection.