“综合与实践”是一类以问题为载体、师生共同参与的学习活动。结合“掷一掷”一课对新旧教材教参的对比研读及多次磨课经历,作者认为这一综合与实践的教学内容可以设计质疑、再质疑、释疑这几个有效的学习活动,最后通过认真辨析,合理解释疑问的思维过程,从而突破教学重难点。 “Integration and Practice ” is a type of learning activities that take issue as the carrier and teachers and students participate together. Combined with the “throwing one” lesson on the old and new textbook teaching reference comparative study and wear mill experience, the author believes that this comprehensive and practical teaching content can be designed to question, re-questioned, dismissed several effective learning activities , And finally through careful analysis, a reasonable interpretation of the thinking process of doubt, so as to break the teaching difficulties.