Study On The Consistency Of Chemistry Textbook Exercises(Published By Shanghai Science And Technology Press)and Curriculum Standards

Chemistry constitutes a vital part of the development of high school core literacy.Evidence reasoning and model cognition,one of the five core literacies,falls into the category of ideas and methods of chemistry.As part of the textbooks,exercises play an essential role in diagnosing and developing students’ core literacy.In this paper,the consistency between the textbook exercises(published by Shanghai Science and Technology Press)and the new curriculum standard is examined from the perspective of "evidential reasoning and model cognition".The main research contents are as follows.First,the consistency evaluation model of the exercises and the curriculum standards.Based on literature research,the SEC consistency analysis model was selected to analyze the consistency between the new curriculum standards and the textbook exercises.The localized SEC consistency analysis framework was established by combining the connotation and four levels of the literacy of evidence reasoning and model cognition with the conventional SEC consistency analysis model.This reformed model is called twodimensional coding framework of "literacy elements × literacy level" in this paper.Second,the coding of the new curriculum standards and the textbook exercises.Based on the framework and method of coding analysis,the author and three postgraduate students coded independently,and the reliability of this coding was analyzed by SPSS software to ensure the objectivity of the coding results.Third,the consistency analysis of the exercises and the curriculum standards.The coding results of the exercises and the curriculum standards were normalized to form a new curriculum standard and exercise coding ratio table.The UNIDRND function in MATLAB software was used to obtain the normal distribution diagram of critical value P’ of 95% reliability.And the Porter consistency index P was calculated.The analysis led to the following conclusions.First,the exercises of the compulsory one module of the chemistry textbooks and the new curriculum standards have statistical consistency in the literacy elements and literacy cognitive level of "evidence reasoning and model cognition".Second,with respect to the distribution of the literacy elements of "evidence reasoning and model cognition",the proportion of the exercises of the compulsory one module of the chemistry textbooks is significantly higher that in the curriculum standards,but the proportion of other elements is close to the curriculum standards.Third,with respect to the cognitive level of "evidence reasoning and model cognition",the proportion of textbook exercises in level 4 of "evidence reasoning" elements is obviously lower than that of curriculum standards,and the proportion of level 1 of "cognitive model" elements is significantly higher that of curriculum standards.The distribution of other literacy elements and literacy level is close to the curriculum standards.Fourth,the "chartmodel","structuralmodel","theoreticalmodel","mathematica l model","symbolic model" and other models in the textbook exercises are in balanced distribution and the cognitive level is moderate.Based on the quality of "evidence reasoning and model cognition",in this paper,the SEC consistency analysis model was localized,and the level index was expanded and refined,making this model more suitable for the coding of exercises and curriculum standards.The research suggests that the content of Level 4 in the "evidence reasoning" element should be appropriately added to the textbook exercises;teachers should make full and flexible use of the textbook exercises in or after class;students attach importance to the construction of "model essence view" in their learning.