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《义务教育数学课程标准》指出:动手实践、自主探索、合作交流是学习数学的重要方式。数学老师在课堂教学中经常会设计一至两个活动,引导学生经历操作、探究、讨论等过程自主建构知识。教材中也呈现了许多很好的操作活动,为教师的教学提供了有效的帮助,但也有不够合理之处。如:人教版数学第十二册教材中,对于圆锥的体积教学设计了这样一个活动:(1)各组准备好等底、等高的圆柱、圆锥形容器。
“Compulsory education mathematics curriculum standards” pointed out: hands-on practice, independent exploration, cooperation and exchange is an important way to learn mathematics. Mathematics teachers in classroom teaching often design one or two activities, guide students to experience, explore, discuss and other processes to build their own knowledge. The textbook also presents many good operation activities, which provide effective help for teachers’ teaching, but there are also some unreasonable points. Such as: PEP mathematics twelfth volume of textbooks, volume design for the conical such an activity: (1) each group ready for the end, contour cylindrical, conical containers.