| Research on problem-based teaching methods has a long history and is still the main research direction of many scholars.As a new teaching method,the "problem string" teaching method has attracted more and more attention from scholars.Its essence is to apply a series of questions with clear objectives,strong relevance,and careful logic to guide students to master knowledge and skills,exercise thinking ability,and achieve teaching objectives.The application of "problem string" in teaching can promote students’ development,and improve teachers’ quality,teaching efficiency,and teaching quality.However,in actual teaching,teachers’ design ability of "problem string" is weak,and the design strategy of "problem string" is not systematic and comprehensive.Based on the above analysis,this study will further improve the design strategy of mathematical "problem string",put forward operable suggestions for teachers’ reference,and contribute to education and teaching reform.Firstly,this study uses the literature research method to carefully sort out the related concepts,classification,design strategies,and research basis of "problem string".Secondly,using the methods of interview and case analysis,this thesis investigates the current situation of high school mathematics teachers’ design of "problem string".This thesis summarizes the difficulties and problems that teachers often encounter in designing the "problem string",puts forward effective countermeasures,summarizes the design strategy of the "problem string",and takes the conical curve as an example to design the "problem string".Finally,the experiment is carried out in classroom teaching.This study uses the methods of questionnaire and interview to evaluate the teaching effect and then tests whether the research conclusion has reference value and application value.The practice results show that the design suggestions and strategies of "problem string" have certain reference and application value,and help teachers improve the efficiency and quality of designing "problem string".The results of the questionnaire show that the "problem string" teaching method helps to focus students’ attention,cultivate students’ problem consciousness,and exercise students’ logical thinking.The "problem string" teaching method has its unique teaching advantages.It is of great significance to improve teaching methods. |