QAR (Question-Answer Relationship) is a reading comprehension strategy developed by Taffy Raphael that helps students answer questions by utilizing both textual information and their own background knowledge. It categorizes questions into four types: right there, think & search, author & me, and on my own, facilitating a better understanding of different question types. The strategy is particularly beneficial for NAPLAN assessments, appearing in over 70% of questions, and provides a structured teaching framework over ten days.