To speak is to engage in spoken exchange. Teaching at a state or private university or college is an activity intended to impart knowledge and skill. The courses taught are part of a planned educational process. Academic goals are defined. Academic credit is offered and must be earned.
Students enroll in the courses to earn credit and reach academic goals.
Instructors must be qualified to teach the subject matter presented. Instructors perform various duties such as planning lessons, giving lectures, guiding discussions, administering tests, performing evaluations, and remaining available for consultation if needed beyond the classroom hours. In contrast, a speaking activity is characteristically a singular or isolated event, not part of a planned educational process. Academic credit is not offered or earned. Students are not enrolled in order to earn credit and reach goals.