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笔者曾为培养学生的探究能力作了一次尝试,收到良好的效果。现介绍于下。 (一)在竞赛中激发兴趣为了激发学生的兴趣,我选取了个人竞赛的方法: 1、自己取数a、b、c组成集合A={-1、a、b、c}; 2、求A中所有数之和S_1; 3、在A中任取两数作积,它们的和记作S_2; 4、在A中任取三数作积,它们的和记作S_3; 5、求A中四个数之积S_4; 6、计算S_1+S_2+S_3+S_4的值。要求:计算结果要保密,算出来的同学要举手。我把算出来的同学名字按先后次序写在黑板上(对学生是鼓励),等大部分同学举手后,再叫他们说出计算的结果-1。
The author once made an attempt to train students’ inquiry ability and received good results. Now introduced in the next. (A) to stimulate interest in the competition In order to stimulate students’ interests, I chose the method of individual competition: 1, take their own number a, b, c constitute a set A = {-1, a, b, c}; The sum of all numbers in A is S_1; 3. Take two numbers in A to make a product, and their sum is denoted as S_2; 4. Take any triple number in A and product their sum as S_3; The product of four numbers S_4; 6. Calculate the value of S_1+S_2+S_3+S_4. Requirements: The calculation results should be kept confidential, and the calculated students should raise their hands. I wrote the names of my classmates on the blackboard in order of priority (to encourage students). After most of my classmates raised their hands, I told them to say the result of the calculation -1.