Good teaching is one-fourth preparation and three-fourths theater.
成功的教学是四分之一的准备加上四分之三的表演。
The mediocre teacher tells. The good teacher explains. The superior teacher demonstrates. The great teacher inspires.
普通的老师告诉你是什么,好的老师告诉你为什么。卓越的老师证明给你看,伟大的老师激发你的潜能。