数学新课程标准指出:“学生的数学学习内容应当是现实的、有意义的、富有挑战性的,这些内容要有利于学生主动地进行观察、实验、猜测、验证、推理与交流等数学活动。内容的呈现应采用不同的表达方式,以满足多样化的学习需求。”有效的数学学习活动 The new mathematics curriculum standard states: “Students ’mathematics learning content should be realistic, meaningful and challenging. These contents should be conducive to students’ initiative in mathematics activities such as observation, experiment, speculation, verification, reasoning and communication Content should be presented in different ways to meet diverse learning needs. ”Effective Math Learning Activities