In order to achieve flexibility in language teaching, in lesson planning the teacher needs to have a clear idea of what to achieve for the lesson and then he needs to set a realistic goal for his teaching.
本题考查课程计划的准则。课程计划的灵活性准则要求教师使用一些不同的教学方法和技巧，使教与学更有效。而题干是对课程计划的目标准则的阐述，因此该表述有误。