Mathematics Teaching In Primary School Grades 3-5 Construction Of Two Rational Relations In The World

Curriculum reform puts forward "teaching contact life world" on the basis of traditional criticism in education, this concept become hot spot in teaching practice and researching.Meanwhile it also exists misunderstanding about scientific world made some causes of teaching problems attributed to scientific world. So, we can't help reflection some problems. First, whether contact life world can really solve all problems or not. Next, Life world and scientific world in the teaching should be opposite or fusion. Finally, how to deal with the relationship between the two worlds in 3-5 grade mathematics teaching of elementary school?This paper attempts to state the connotation of scientific world and life world and construct rationality relation between them. Based on the theory of this relationship. we reflect estranged phenomenon between two worlds in 3 to 5 grade mathematics teaching of elementary school, and make efforts to build rationality relations of two worlds in the teaching.Two world rationality relations mainly reflect in three aspects. First, in feeling level:life world is the world can be perceived. Scientific world is abstract world, feeling and perceived world is initial world, which was the construction of a scientific world starting point and foundation; second, in meaning level:life world is the meaning foundation of the scientific world.Scientific world is the meaning ascended of the life world. Thirdly, in value level:value is the inner link of scientific world and people and life world, scientific world is unity of subjective and objective, values and facts. The purpose of construction of scientific world is to reflect the value pursuit of the life world. There are some reflects in specific aspects.For example, the interaction between subjects; Daily language and scientific language's mutual transformation; two worlds realize fusion and unify in dynamic generation in practice.We reflect teaching between 3 to 5 grade mathematics of elementary based on the rationality relation of the two worlds, found that in the teaching has two worlds disenchanted, it mainly reflects in such aspects. first, it reflects the far-fetched of teaching link life world, it aims to contact and contact; next, teachers and students stands unequal relationship, the students' subjective didn't get sufficient using; "practice and comprehensive using" also exists some shortcomings, such as purpose is not strong, practice contents uniqueness, extracurricular practice be ignored, etc.; finally, it reflects that the surface of knowledge transferring in teaching. it ignores the relationship between knowledge,ability and meaning.To construct two world rationality relations is this paper's point in mathematics teaching.This paper analyses rationality of the teaching material contents firstly. First, it displays the rationality relations from mathematics knowledge.specifically, It partials or cuts old knowledge and adds the knowledge of life world, it reflects grumous vitality in presentation.secondly.to construct mathematical knowledge in "practice and comprehensive using". Textbook designs numerous activities such as hands-on, exploration, investigation and other activities.And using mathematical knowledge in practice to solve problems to strengthen the contact of the two world, while it also have some introspection about material textbook. Next, to construct the rationality of two world in the process of teaching mainly from the following five points.firstly, the construction of teachers and students associations between subjects, namely eacher-student interaction, equality, mutual understanding of two-way communication. Second, promoting daily language and mathematics language"s interaction in teaching. And trying to translate he daily language into mathematics language, and master mathematics language in daily language. Hold internalizing students' mathematical language into daily language. Thirdly, the interaction between life scenes and mathematics abstraction. The transformation from abstraction to life is teaching task. from adaptation to mathematical is teaching pursuit. Fourth, using the knowledge power to practice comprehensive utilization ability and promote the coordinated development of the knowledge and ability. Fifth, To deepen the meaning of math knowledge in understanding and achieve meaningful personalized understanding in the generation. At last, it points out that teaching two world rationality relationship in mathematics teaching from 3-5 grade is to promote three-dimensional teaching target realization and Promote students harmonious development in mathematics teaching field.