一、引“路径”,学会分析。在数学中,仅仅满足于让学生“知其然”是远远不够的,还必须使学生“知其所以然”。教学中,要从学生的实际出发,由易到难,循序渐进地教给学生分析问题和解决问题的基本方法。例1AD为△ABC的一条中线,任引一直线CEF相交AD于E,交AB于F。求证:AEED=2AFFB First, lead the “path” and learn to analyze. In mathematics, it is not enough to just satisfy students to “know what they are”, and students must “know what they are doing”. In teaching, it is necessary to proceed from the students’ realities, from easy to difficult, and to teach students step by step the basic methods for analyzing problems and solving problems. Example 1AD is a midline of △ABC, any leading line CEF intersects AD to E, and AB to F. Proof: AEED=2AFFB