Yes and no.

If you are teaching in a Brazilian English course and if this course has a certain "parrot" mentality you mustn´t change so much the called "currículo", you can even be fired.

But if the course is your(aula particular, por exemplo), then it´s entirelly another story; you can and must innovate in all your capacity to train the "brain cells" of students of yours.

The latter is more burdensome, but pays in the end.