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现代教学媒体在课堂上是一把双刃剑。有效运用现代教学媒体能够帮助学生理解并建构数学知识,支持学生对知识的理解,加深学生对数学知识的发生、本质以及价值等的认识,为师生的有效互动提供物质基础。但如果我们不能恰当地选择和驾驭它,一味地循着媒体预设的过程演示,就会走入变相填鸭的歧途,这样反而会干扰学生的思维,影响学生主体作用的发挥,最终会
Modern teaching media in the classroom is a double-edged sword. Effective use of modern teaching media can help students understand and construct mathematical knowledge, support students’ understanding of knowledge, deepen their understanding of the occurrence, essence and value of mathematical knowledge and provide material basis for effective interaction between teachers and students. However, if we can not properly choose and control it, blindly following the process of media prepositioning, we will go astray in disguise. This will, in turn, interfere with students’ thinking and affect the role played by the students. Ultimately,