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心理学指出:使学生的两种信号系统协同活动是取得良好教学效果的必要条件。用模象直观加强对教材感知,能加深理解。初中应用题教学是一个难点,只靠第二信号系统的条件反射会造成学生心理上失调。因为不少应用题数量关系隐晦,初中学生抽象认识能力不足。为了准确地把握应用题数量间的内在联系,可以采用数形结合方法,利用几何图形性质直观地建立已未知量间的等量关系。根据上述认识,本文就行程、工程、浓度、溶液等问题,探索用几何解应用题的方法。这一方法能使大脑两半球协同活动,从而促进学生心理发展,提高教学质量。以下试举数例予以介绍:一、浓度问题例用浓度为5％和63％的两种烧碱溶液混合配制浓度为25％的烧碱溶液300公斤。需这两种烧碱溶液
Psychology pointed out that: Making students’ two signal systems coordinate activities is a necessary condition for achieving good teaching results. Intuitively enhancing the perception of teaching materials with a model can deepen understanding. The problem of junior high school teaching is a difficult problem. The conditioned reflex of the second signal system can cause students to be psychologically misaligned. Because of the hidden relationship between the number of applications, junior high school students lack of abstract cognitive ability. In order to accurately grasp the intrinsic relationship between the number of applications, the number-shaped combination method can be used to intuitively establish the equal-quantity relationship between the unknown quantities using the nature of the geometry. Based on the above understanding, this paper explores the methods of solving problems with geometry solutions for problems such as travel, engineering, concentration, and solution. This method can make the two cerebral hemispheres coordinate activities, thereby promoting the psychological development of students and improving the quality of teaching. The following are a few examples to introduce: First, the concentration of the problem with a concentration of 5% and 63% of the two caustic soda solution mixed with a concentration of 25% caustic soda solution 300 kg. Need two caustic soda solution