知识表征的清晰度、牢固度、系统度是衡量知识表征质量的三个指标。要提高学困生的学科学习水平,首先就要提高学生知识表征的三个指标。所谓知识表征的清晰度,就是知识内容在头脑中记载、呈现的准确程度、条理化程度。知识表征的清晰度高低取决于学生头脑中相似知识的准确辨认 The clarity, firmness and systematicness of knowledge representation are three indicators to measure the quality of knowledge representation. To improve the learning level of students with learning difficulties, we must first improve the three indicators of student knowledge representation. The so-called clarity of knowledge representation, is the content of knowledge recorded in the mind, showing the degree of accuracy, degree of organization. The level of clarity of knowledge representation depends on the accurate identification of similar knowledge in the student’s mind