The Design And Practice Of Students Grouped Experimental Teaching For High School Chemistry

Changing the way of students' learning styles and improving students' scientific literacy in the new learning culture are the core issue of current curriculum revolution of chemistry.Teachers should carry out a variety of teaching activities based on chemical experiment as the main method to make students change the way of learning and get interest of study has become the focus of the new curriculum reform.In the learning activities,students' subjectivity is emphasized.Based on the new results of human learning and new ideas on the development of the education system,and it depends on the chemistry of science and reflects the high school students' overall coordinated development.Therefore,chemical experiments occupy an important position in the field of chemistry.According to the current society's demand for professional talents,the necessity of middle school chemistry students' experiments,and students' interest in learning,this paper uses high school chemistry student grouping experiments as the research perspective to design and implement teaching cases.It is hoped that students' learning ability will be improved through grouping experiments and teachers will be provided with help in the literacy and ability of chemistry experiments.Through the statistical analysis of the chemistry experiment teaching methods in eight county-level high schools in Baoji City,the results showed that: 91% of teachers choose to use demonstration experiments or video playback experiments as the teaching method of chemistry experiments,There are 9% of teachers who choose grouping experiments,but 80% of students like the way of grouping experiments.This shows that most of the students prefer to do their own way of experimentation,but at present this kind of experiment has not been widely used.Therefore,according to the characteristics of high school experiments and the theory of effective teaching theory,constructivism theory and other learning theories,this article carries out group teaching design for some experiments of high school chemistry,The teaching design includes two teaching design patterns.They are student-self-study mode and student-side experiment side Summary mode.The paper selects four more important experimental designs in the teaching practice based on these two models.The author exemplifies the instructional design of the Reaction of metal sodium with water,the decentralized system,and the classification of the instructional design based on student-autonomous experimental teaching model.The author exemplifies the Solution preparation teaching design and Ammonia chemistry teaching design based on student-experimental model.Based on my teaching practice at Qishan Senior Middle School in Shaanxi Province,I conducted a study on the teaching case that I designed.Two parallel classes of the first-year high school were chosen as experimental subjects,one class was grouped with experimental teaching design,and the other class was conducted with traditional experimental teaching methods.After the teaching practice,a comparative study of the two test scores of the two classes is conducted first.The results show that the average score of the experimental class is higher than that of the control class in the comparison of the results of the midterm examination and the final examination.Moreover,in paired-sample t-tests for scores,the value of P were all less than 0.05,indicating a significant difference between the experimental class and the control class.Secondly,by collecting survey questionnaires for experimental classes,we have the opportunity to understand the changes in students' understanding ability,interest in learning,experimental ability,and non-intelligence factors after the teaching practice.Practical research shows that students' grouping experiments is beneficial to the students' mastery of knowledge,learning interest,experimental ability and non-intellectual factors.Therefore,when designing grouped experiments for students,teachers are required to have a higher level of literacy and knowledge.At the same time,students are required to have a certain ability to independently design experiments.This requires the joint efforts of all parties.