Research And Practice Of Classroom Lead-in Junior High School Physics

Classroom lead-in is an important part of classroom teaching.Which is the primary link to regulate students' learning status and classroom atmosphere,improve classroom efficiency and optimize teaching.However,the current background of exam-oriented education in China,with the increase of the pressure of entrance examination,the low importance attached to the of teaching or even neglected,the long-term and high-intensity examination-oriented teaching leads to students' low interest in physics learning,low teaching efficiency and so on.The thesis makes the following research on how to use classroom lead-in to optimize junior middle school physics classroom teaching,improve students' learning enthusiasm and cultivate students' physics core literacy: firstly,the literature research method is used to clarify the significance,contents and methods of the subject research.The thesis combs the research status and achievements of classroom lead-in at home and abroad.Based on the investigation and analysis of the current situation of physics classroom lead-in in junior middle school,it is found that there are the following problems: teachers do not pay enough attention or even ignore the classroom lead-in link,lack of consideration of student participation and training in the lead-in design and practice;the lead-in content sometimes deviates from the theme,the time control is not good and the lead-in method is outdated;teachers' professional accomplishment is not high.According to the requirements of curriculum standards and existing problems,seven design principles are put forward based on constructivism theory,advance organizer theory,STEAM education theory,teaching optimization theory and theory of humanism: pertinence,science,interest,enlightenment,vitality,relevance and timeliness.And five lead-in strategies:goal-oriented clear strategy,vivid and novel interest-stimulating strategy,strengthening classroom control strategy,divergent enlightening thinking strategy,strengthening teacher-student activity strategy.According to the principle and strategy of integration,five teaching cases of "Speed of Motion","production and spread of Sound","vaporization and Liquefaction","dispersion of Light" and "Lens in Life" are carefully designed.The case study is carried out by using the method of experimental study and case analysis,and the practical research is divided into experimental class and control class.Through the observation of students' classroom performance,the change of unit test and analysis results and the way of questionnaire to understand the comprehensive factors affecting students' physics learning,the data show that all the indexes of the experimental class are higher than those of the control class.it indirectly reflects the effectiveness of classroom design principles and strategies.Practice shows that classroom has significantly improved students' interest,learning willingness and class status,greatly heated up the classroom atmosphere,optimized classroom teaching and improved teaching efficiency,indicating that classroom lead-in in junior middle school physics classroom teaching is of great practical significance.Finally,the author summarizes the research results of this project,combining the practical research with the analysis of the causes of the current situation of junior high school physics classroom teaching and puts forward his own suggestions.It is hoped that the research results of the thesis can provide some reference for relevant researchers and contribute to the development of physics education.