Research On The Development And Application Of Chemical Science Thinking Assessment Tool For Grade 9 Students

Scientific thinking is an indirect,generalized and active reflection of the human brain on the essential attributes,internal rules and internal relations of things in nature(including object,process,phenomenon,facts,etc.),which plays an important role in promoting the cultivation of innovative talents.Chemistry Curriculum Standards for Compulsory Education(2022 Edition)put forward chemistry discipline core literacy of chemical concept,scientific thinking,scientific inquiry and practice,scientific attitude and responsibility.As an important part of chemistry discipline core literacy,scientific thinking is of great practical significance to the integrated development of students and the cultivation of innovative talents.On the basis of literature review,this study confirmed theory foundation.Referring to the objectives of Chemistry Curriculum Standards for Compulsory Education(2022 Edition),and combining with the cognitive characteristics of the Grade 9 students and the characteristics of chemistry learning,this study constructed the chemical science thinking frame of grade 9 students.There are 5 first dimensions,including chemical experimental thinking,analysis of chemical facts from the perspective of discipline,understanding of substances with general scientific methods,solving chemical problems with the thinking model of discipline,and solving practical problems from the perspective of interdisciplinary.Based on this,combined with the chemistry learning content of junior middle school,this study designed The Assessment Tool of Chemical Science Thinking for Junior Middle School Students.Winsteps software was used to test the reliability of the assessment tool,and the assessment tool was optimized according to the test results.After 2 rounds of quality inspection and optimization,the assessment tool of chemical science thinking of junior middle school students was obtained.Its reliability is 0.98 and the item separation degree is 7.95,which meets the requirements of assessment.The assessment tool was used to assess the chemical science thinking of 236 Grade 9 students,and the Winsteps software was used to process and analyze the data of the retrieved valid questionnaires.The following research conclusions were obtained:(1)The chemical science thinking of Grade 9 students is at a good level.(2)In terms of gender and region,there is no significant difference in chemical science thinking of grade 9 students;In terms of academic performance,there are significant differences in chemical science thinking,and the level is ranked as top students>middle students>potential students,showing a trend that the higher the academic level,the higher chemical science thinking level.(3)The Grade 9 students showed different performance in the five first dimensions of chemical science thinking.The dimension of “chemical experimental thinking” is at a passing level but close to a good level.The four dimensions of Analyzing chemical facts from the perspective of discipline,understanding substances with general scientific methods,solving chemical problems from the perspective of discipline thinking model,and solving open problems from the perspective of interdisciplinary are all at a good level.The dimension of Solving open problems from the perspective of interdisciplinary is close to excellent level.Based on the above research conclusions,this study proposes some suggestions for the development of assessment tools and teaching suggestions:(1)The theoretical basis of constructing chemical science thinking model from multiple perspectives;(2)Close to the reality of students,optimize the thinking model of chemical science;(3)Increase the number of test samples to improve the reliability of test tools.Teaching suggestions:(1)Pay attention to the cultivation of students’ thinking mode of “macro,micro and symbolic”;(2)Strengthen the cultivation of students’ systematic thinking;(3)Pay attention to the training of students’ scientific thinking method;(4)Pay attention to the cultivation of students’ high-level thinking ability.