QUESTION:
In some classes, course grades are based solely on exams, while in other classes, grades are based more on class participation than on exams. Which type of grading do you prefer? Use specific reasons to support your response.

In order to answer this question, I wrote introductory paragraph like this.

I prefer grades which are based more on class participation than on exams, in terms of process of learning, attitude, and our effort.

I know this is too short, however I don't know how to write longer and better introductory paragraph for this type of question, so please tell me how to write.