In the natural science or engineering science, a calculus is an obligatory subject. So there are many classes in the university every year. Commonly professors manage the course individually. Many classes in a row individually got into trouble about lecture, test and assessment and so on. To solve the above problems, alternatively we introduced the concept of joint control. We used the joint syllabus, test and assessment. In this paper, we found the necessities and effects of joint control in a calculus.