| In the process of practicing the new curriculum standard,to constantly promote the class structure is the common aim of the front line teachers.In the Chemistry Curriculum Standard for High Middle School 2017,it emphasises that the core attainment is the purpose for chemistry education,which demands the chemistry teachers to renew teaching concept,and to promote class structure.To improve teaching effectiveness,it is important to participate in chemistry class,and to analyse the class structure,then it is possible to research the inner regularity,improve class structure,and promote the teaching efficacy.This research uses CPUP model to analyse chemistry experiment class with two dimensions,teaching content and action,ten qualified class of National High School Qualified Class Competition in 2014.In these classes,this essay analyses two parts,which are “the important compounds of elements” and “concept and ethic” by the methodologies of class observation and statistical analysis.This essay also divides the class content into rate of importance,experimental teaching time,method,and action chain within CPUP model.By analysing the systematic and structural divisions,this essay presents the results in visible,retrospective,analysable methods as follow:The result shows 1)The teachers regard experiment as an important part in teaching process,in which the average experiment time occupies about 40 per cent.2)The teaching content primarily uses level A and B of CID,and assisted by level C,therefore the difficulty is proper for students’ consciousness.3)The importance of content is positive correlated to its timing arrangement,so it can guarantee the teaching aim corresponding to new curriculum standard.4)The teachers have diverse styles and teaching concepts,so they have different explanation on same course,which influences on action chains choices.5)The main action chain in experiment part is action chain A(autonomy)and chain B(communication),which causes positive class interaction and students’ involvement.6)The interaction of different action chains can make the class more active,which can motivate students’ learning interest and enhance class effectiveness.7)The experiments is limited by objective conditions,so they present the results variously.By illustrating the results,on one hand,different teaching design can reach same teaching aim;meanwhile,it is difficult to conclude absolute privilege structure because of variety of teaching and experimental conditions,teachers’ personality and attainment,students’ abilities on acceptance and expression and so forth.On the other hand,by evaluating the teaching aim realization and students’ reaction on knowledge and practice,the author states that the effective process is posing question – designing experiment programme by both teacher and students – experiment operation by students independently or by teacher and students cooperatively – dealing with experiment results.Based on the phenomena above,the author presents suggestions for the CPUP model,and concludes the methodology of the content importance degree(CID),and creates the teaching design of “the important compounds of sodium”,which is based on modified model.The CPUP model can illustrate teaching actions in class,and offer new concepts for researches such as examining teaching effectiveness and learning initiative,and it offers theoretical and practical concept on teaching design and evaluation for the front line teachers. |