| During the process of deepening curriculum reform,classroom teaching is the main perspective of teaching reform research,while research on class question is one of the most important research fields of classroom teaching.Data analysis shows that there are many researches on how to ask questions in the classroom,but there are few studies on the research of “problems string”,especially evaluation index systems for the effectiveness of the problems string.Therefore,this paper attempts to construct an evaluation index for the effectiveness of the problems string in middle school biology teaching,and then tries to form a scientific,reasonable and feasible evaluation system.The research methods used in this paper including: literature research,expert interview,issuing questionnaire,classroom performance observation and so on.The main contents involve the following two aspects.Firstly,build an evaluation index system according to expert interview feedbacks and questionnaire results,and referring to the domestic and overseas relevant literatures of recent years at the same time.Secondly,use the classroom performance observation method to practically inspect the rationality and feasibility of the evaluation index system,so as to further evaluate the effectiveness of the problems string design.The experimental results showed that the evaluation index system for the effectiveness of the problems string in middle school biology teaching has good reliability and validity in practical application,and has diagnostic function.Besides,classroom assesment feedback indicated that different evaluators have a good agreement on the evaluation of the effectiveness of the problem string.For these reasons,the evaluation index system introduced in this paper can not only apply to evaluate the problems string but also guide the design and optimization of the problems string,and provided a reference for the in-depth study of problem string-based biology teaching. |
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