Practical Research Of PAD Class Teaching In High School Chemistry Based On Problem-Solving

Problem solving refers to the whole process in which teachers and students jointly discover,raise,analyze and solve problems under specific problem situations.Pair class refers to the classroom teaching that includes three links:teacher's teaching,students' internalization,absorption and discussion,referred to as PAD class.The key is to stagter the teaching and discussion in the classroom teaching,so that students can have a period of independent learning time for internalization and absorption.This study is based on the requirement of cultivating students' core quality and the need of the transformation of classroom teaching methods.In order to improve the efficiency of classroom teaching and provide some experience for the middle school chemistry teaching,the problem solving based pair points is used to organize the whole class teaching,and the knowledge points are learned through the clue of "problem solving".In this study,the literature research method was adopted to sort out and analyze the problem solving and the research status of sub-classroom,so as to guide the definition of relevant concepts.Under the guidance of constructivism,humanism and the learning theory of zone of proximal development,the model of teaching practice is constructed and its principles and strategies are analyzed,so as to design the teaching practice process.Combined with ordinary high school chemistry curriculum standard(2017),selected the chemistry for high schools are required a fourth chapter "nitrogen compounds and its important knowledge" design"the protagonist in the chemical fertilizer,nitrogen fertilizer" "the main raw material of synthetic nitrogen,ammonia""nitric acid to explore the nature of" the three teaching cases,in ningxia hui H middle school carries on the practice,the high grade in the teaching link,Teachers create real problem situations,define learning tasks,design learning activities,and put forward problem chains.In the process of internalization and absorption,students study independently and analyze the explicit problems.In the discussion section,the teacher guides the students to solve the problems.Through questionnaire survey,interview,paper and pencil test,classroom observation and other methods to analyze the effect of practice.The results show that it is necessary and valuable to divide classroom teaching based on problem solving.The efficiency of teaching and learning can be improved through the intensive teaching and blank space,and the students can have the opportunity to think individualized.Students form their own opinions in independent learning and thinking,actively communicate in discussion,strengthen critical thinking,improve problem-solving ability,stimulate learning enthusiasm and initiative,and realize the realization of the core quality of chemistry.