Design Of Digital Chemistry Experiment Teaching Cases For Cultivating "Model Cognition" Literacy Of High School Students

Core literacy is the main training goal for high school students in the new curriculum standard,and it occupies an important position in the reform of education and teaching in the new curriculum.The core literacy of chemistry is the key literacy to solve chemistry-related problems during the development of students'cognitive activities.Model cognition is an important dimension of the core literacy of chemistry,and it is also an integral part of the development of thinking in chemistry.Promoting the cognition ability of high school students'chemistry models is of great significance in cultivating students'core chemistry literacy,improving the efficiency of chemistry learning,and improving the quality of chemistry teaching.This article focuses on the core literacy of"model cognition"in senior high school chemistry,and uses the experimental resources in the textbook of human education to design digital experimental teaching.It attempts to cultivate the core of"model cognition"in chemistry experiment teaching with the background of chemistry core literacy Literacy.In the case design process of this article,the literature method,case study method,and test investigation method were used to conduct in-depth research:First,the literature and data collection of the current status of domestic and foreign research on the core literacy of chemical"model cognition"and the current research status of digital experiments were collected.On the basis of consulting a large amount of information and investigating the actual situation of the current education and teaching reforms,based on the current research status of core literacy of chemistry and digital experiments,combining the research results during the internship and their own internship practices,this article explores how to improve students'"model recognition"Knowledge"core literacy.The second is the combination of"model cognition"in high school chemistry experiment teaching.Four digital experimental teaching cases are designed,namely:1.Exploring the effect of temperature on the use of foam fire extinguishers;2.Constructing ZnO,Zn（OH）₂ Cognitive model of amphoteric compounds;3.Exploring the coordination reaction history of NH₃ with Ag⁺and Cu²⁺;4.Exploring the disproportionation reaction history of Na₂S₂O₃.By demonstrating and analyzing the application effects of digital experiments in cultivating students'"model cognition"core literacy in senior high school chemistry experiment teaching,a strategy is derived,that is,integrating senior high school chemistry experiment teaching resources to enhance students'evidence reasoning ability;systemizing and guiding experimental teaching Students build cognitive models.Through the design and implementation of the digital experiment teaching case for high school chemistry,the following conclusions were reached:（1）helping students to form a rigorous and scientific view of inquiry,understanding the inherent logical relationship between chemical knowledge,and constructing a model of chemical knowledge;Cultivate students'awareness of evidence,proof,logic and problem-solving;（3）Closely connect with life,help students understand the extensive application of chemistry in life,and form a green life concept.