“以探究为核心”是自然课多年的基本理念。在探究活动中,教师对学生的活动实施适当的表扬、赏识,对于培养学生的自信心和创新能力都有一定的作用。然而,现实自然教学活动中存在的一些廉价赏识现象却令人担忧,比如,学生对某一问题 “Explore as the core” is the basic idea of ​​many years of nature class. In the inquiry activity, the teacher appraises the student's activity suitably, appreciates, has the certain effect to the training student's self-confidence and the innovation ability. However, there are some problems of cheap appreciation in realistic teaching activities, such as students'