“学困生”是让教师很头疼的一个学习群体,他们往往上课不专心听讲,精力不集中,反应迟钝,接受能力差,学习方法不当……实际教学中,教师常常戴着“偏色眼镜”来看待他们:“学困生”就是“学习处处有困难、时时要帮助”的代名词。但是,一道习题的教学,让我的想法变了。苏教版小学数学四年级下册《三角形的特征》一课,教材安排了一道练习题,要求学生用七巧板拼三角形,并提出了三个要求:(1)选两块拼一个三角形;(2) “Students with learning difficulties ” is a learning group that makes teachers have a headache. They often do not concentrate in class, lack of concentration, unresponsiveness, poor ability to accept, improper learning methods. In actual teaching, teachers often wear “ Color cast glasses ”to treat them: “ poor students ”is“ synonymous with ”learning difficulties everywhere, always help “. However, the teaching of a problem changed my mind. Sujiao version of elementary school mathematics grade four volumes ”Triangle characteristics" a lesson, textbook arranged an exercise question, requiring students to use a jigsaw puzzle to fight the triangle, and made three requirements: (1) choose two spell a triangle; )