The Practical Research Of Problem-string In Education Of Junior Math

"Problem-string" refers to a series of questions carefully prepared by a teacher before class according to the logical structure of knowledge and students' learning conditions,which helps students understand a certain knowledge."Problem-string" teaching is a kind of teaching method that teachers apply the carefully designed "problem-string" to the class and use it to stimulate students' thinking and promote students to learn actively.This article mainly adopts the literature analysis method,the class observation method,the interview method and the teaching experiment method.Firstly we learn the present implementation situation of the "problem-string" teaching mode of some township middle schools in Wusheng county,Guang'an city by listening to the class personally and taking the individual interview and carry on the classroom observation of three lessons with the "problem-string" teaching thought as the guidance,and learn the teacher's implementation situation of "problem-string" and the student's situation of study.One of three lessons will be described exhaustively in the article.Then,on the basis of the existing research on "problem-string ",combining with the excellent first-line teacher's proposal and the author's own understanding of " problem-string " teaching mode,the author puts forward the design strategy of " problem-string ",and taking research about the design idea of "problem-string" of different teaching contents respectively.Finally,according to the author's design strategy and design ideas,we design "problem-string" and apply it to practice,and summarize the teaching effect of the "problem-string" teaching mode by teaching experiment method.The main results of this paper are as follows:(1)It is concluded that the problems and difficulties in the implementation of the teaching mode are mainly as follows: most teachers are used to adopt the teaching mode of instructing,some teachers do not understand the teaching mode of "problem-string ",some teachers cannot design the "problem-string" scientifically and reasonably,and some students are not active in the class.(2)Five design strategies of "problem-string" are put forward: the design of "problem-string" should aim at the teaching goal;the design of "problem-string" should be moderate in difficulty and hierarchical;the "problem-string" should be suitable in capacity and enlightening;the design of problem-string should be as lively and interesting as possible;and the design of "problem-string" should deal with the relationship between generation and presupposition.(3)The design ideas of "problem-string" in the concept teaching,proposition teaching,exercises teaching and review and summary teaching are analyzed.(4)Three complete teaching practice cases about "problem-string" are given.(5)The teaching effect of the "problem-string" teaching model is obtained: the "problem-string" teaching model helps to improve students' interest in learning and learning performance,and helps to reduce the two-level differentiation of students.(6)Through reconsidering the practice,the following points should be paid attention to when applying the "problem-string" teaching mode: in the process of carrying out the "problem-string" teaching mode,it is very important to arouse the enthusiasm of the students,and in the teaching process teachers should not only focus on the "superficial excitement" but also find the key points to make knowledge understand easily,and all students should be involved as possible in the process of carrying out the "problem-string" teaching mode.