张老师是我们的数学老师,从一年级开始一直教我们。(开头介绍虽简洁,但后一句说明作者对老师很熟悉,增加了可信性)张老师是一位慈祥的老太太,留着卷发,看起来很精神,一双大大而充满智慧的眼睛,同学上课时的小动作都逃不过她的目光。(抓住主要特征表现人物的精气神)虽然张老师已经不再年轻,但她的心依然那么年轻。不信,你听我说。(过渡 Teacher Zhang is our math teacher who has taught us since the first grade. (The introductory introduction is concise, but the last one shows that the author is familiar with the teacher and adds credibility.) Zhang is a kind old lady with curly hair and looks very energetic. Her eyes are big and full of wisdom, her classmates The little tricks in class can not escape her gaze. (Mastering the Lean Spirit of Main Characters) Although Teacher Chang is no longer young, her heart is still young. Do not believe, you listen to me. (transition