我在二十多年的生物学教学中利用对比,归纳,联想等方法,把知识系统化,条理化,让学生记忆牢固,理解透彻。如用歌诀,谜语,农谚的方法表示生物的特征,既突出重点,化难为易,又生动形象,通俗易懂。现选登如下: In the more than twenty years of biology teaching, I used the methods of contrast, induction and association to systematize and systematize knowledge so as to make students remember firmly and thoroughly. Such as the use of song tactics, riddles, farming proverbs way to express biological characteristics, both highlight the key, the difficult for the easy, vivid image, easy to understand. The list is as follows: