一般情况下,小组讨论法教学,教师在使用过程中,一定要明确它的优点与不足,应用小组讨论法能活跃课堂的气氛,但也有的同学在聊与教学内容无关的话题;通过小组讨论能够解决教学中的难点和重点,但有时也达不到要求的教学效果和目的。在测定粘性土的液限与塑限试验中应用了小组讨论法,通过分析测定粘性土的液限与塑限试验属于间接教学,适合应用小组讨论法。 Under normal circumstances, the group discussion of law teaching, teachers in the use of the process, we must clearly its strengths and weaknesses, the use of group discussion method can activate the atmosphere of the class, but some students chatting about topics unrelated to teaching; through group discussions Can solve the teaching difficulties and priorities, but sometimes can not meet the requirements of teaching effectiveness and purpose. In the determination of liquid and liquid plastic limiting limit test sticky group discussion method used to determine the liquid limit and plastic limit test by cohesive soil are indirect teaching, suitable for the use of group discussion.