《卵石是怎样形成的》是一堂难度较大的逻辑推理课,重点在于指导学生运用推理的方法认识卵石的形成过程。由于卵石的形成需要很长的时间,卵石走过漫长的“道路”,学生无法直接感知。若用传统教学手段,采用挂图,用语言讲解,很难充分发挥学生的思维想象能力,会使学生感到枯燥无味,而利用录像教材,可以克服这种时 “How Pebbles Form” is a more difficult logical reasoning course, focusing on guiding students to use the method of reasoning to understand the formation process of pebbles. As pebbles take a long time to form, pebbles go through the long “path” where students can not perceive directly. If the traditional teaching methods, the use of flipcharts, using language to explain, it is difficult to give full play to students' thinking skills, make students feel boring, and the use of video materials, you can overcome this time