Junior High School Mathematics Teaching Design Based On The "Situation- Model" Two-Way Construction

Along with the development of the times, along with the new curriculum reform, "compulsory education mathematics curriculum standards(2011 Edition)" will "model thought" as the ten "core concepts". Mathematics education and mathematics teaching design also has the new development and the new research angle of view. The mathematics situation and the situation teaching always are the mathematics education worker studies the key object. Under such a background. In this paper, the mathematical teaching situation and model of thought combined research the design of mathematics teaching from the perspective of "situation" and "model" two-way construction, which will be on the teaching design of a new attempt.This research mainly uses the literature research method, case analysis method of "situation", "model", "two-way construction" and "teaching design" concept, based on the characteristics of instruction design of two-way construction for situation model,principle and method were studied, preliminary achieved as the conclusion:"The situation model" two-way construction includes two layers of meaning, one refers to the subject of learning through the coordination function, from mathematical situations in a math model of a mathematical situation to study from one or more of the angle of mathematics model, improve the learning subject for the abstract understanding of mathematical situation, complete the "situation" to "model" construction; the two refers to the subject of learning through the mathematical model of the objective world in construction, the mathematical model is thought into one or more mathematical situations and mathematical model of the interpretation or use, deepen learning subject to substantial mathematical model of the flexible use of understanding, to complete the "model" to the construction of "situation".The "situation- model" bidirectional construction has the features of abstract,rationality, optimization, rigor, flexibility, diversity, compatibility and close to life experience. Situations model of two-way construction characteristics of instruction design based on, in the teaching goal prominent characteristic of mutual construction ofsituation model, process experience characteristic, behavior on the participation characteristics, teaching emphasis highlight two-way building characteristics and teaching difficult to highlighting the experience of characteristics and features of teaching methods to highlight the activities, highlighting the interactive features of the teaching process, teaching evaluation on construction character of the three-dimensional target highlight the process.Based on situation model of Bi construction of teaching design should meet the following basic principles: selection of typical cases, to reveal the construction strategy,reflect the multiple representation, simplification of unknown variables, show construction process, strengthen the consciousness of monitoring etc. six principles.Teaching method design method based on the situation model of Bidirectional Construction: a situation a model, a multiple context model, a model a situation, a model multiple scenarios such as four basic methods 4 teaching design method.The on the basis of the above research, the specific choice of six junior high school mathematics content, use situations model of two-way construction of instructional design features, principles and methods based on the teaching design case analysis.At last, this paper makes a reflective study on the problems and shortcomings of the research, in order to help the follow-up studies and peer criticism and correction.