However, if the text is on an unfamiliar topic, the teacher should provide students with relevant background knowledge because they play a vital role in reading processing according to schema theory.

• 假如所学课文是他们不熟悉的题材，教师就要向他们介绍相关的背景知识。 因为根据图式理论，背景知识在阅读过程中起着关键作用。