Abstract Taking Guangdong college entrance examination in 2021 as an example, this paper studies the situation and types of test questions, and finds out the characteristics of situational test questions. This paper analyzes the research status of situational teaching, puts forward a teaching design model based on real situation, and summarizes its elements and general process. Based on the case study, from the perspective of returning to textbook knowledge, deeply mining test questions, creating cognitive conflict, creating teaching situation, combining with the ternary integration strategy, this paper puts forward the perspective of creating classroom problems, in order to improve the effectiveness of classroom teaching and put forward teaching suggestions for the review of micro topics in senior three.