A Practical Study On The Conceptual Measurement And Concept Transformation Of Primary School Student In The Water Unit

Water is an important substance in nature and also an important content in primary school science study.In the process of learning "water" unit,there are a large number of preconception,which directly affect their construction of water-related concepts.The purpose of this study is to develop a pre-concept assessment tool for water unit,enrich relevant teaching theories,improve the knowledge level of water unit,provide ideas for front-line teachers to carry out water unit teaching.Firstly,this study uses the literature method to sort out the domestic and foreign literature about the preconception and establish the connotation and characteristics of the preconception.This study firstly uses the literature method to sort out the domestic and foreign literature about the preconception and establish the connotation and characteristics of the preconception.Then the questionnaire was designed from the concept of water,solidification and melting,dissolution,evaporation and separation and other core concepts.Investigating the third grade students of a primary school in C City,J Province.It is found that preconception exists in primary school students in water unit.The main reasons affecting the formation of water preconception are semantic understanding,over-generalization,negative transfer of knowledge,individual difference and scanty knowledge.Based on the preconception of "water" unit hold by primary school students,this study conducted a teaching experiment on the preconception of water unit in primary school students.This study took "Where does water Go" and "How many Substances can Water Dissolve" as teaching practice cases to verify the feasibility of teaching strategy on concept transformation.By comparing the results of the questionnaire before and after the teaching effect analysis,it is found that questioning teaching strategy and concept map teaching strategy can effectively improve the students' water thematic knowledge level.Teachers' concept transformation teaching in water unit is helpful to improve the quality of concept teaching,facilitate students to construct scientific knowledge system and further cultivate students' scientific literacy.In order to provide relevant inspiration or reference for front-line teachers to carry out water unit teaching.