The most intelligent students do additional reading to supplement the material in the textbook.

最聪明的学生用增加阅读量课本的内容。

She inscribed her own name on the textbook.

她将她自己的名字题写在课本上。

There is a vocabulary at the back of our English book.

我们英语课本的后面附有词表。

This textbook has twenty lessons.

这课本有二十课。

Not be constrained on textbook, if you have thorough research to thingamy, can consider to study achievement serves as achievement.

不是拘泥于课本上的，如果你对某东西有深入究，可以究成果作为成绩。