Teaching of General English courses at universities and at universities of science and technology in Taiwan relies heavily on part-time instructors. The strategies undertaken by part-time instructors of General English in response to course management regulations affect their teaching practice. The study participants were six part-time General English instructors teaching at 13 university language centers. This study applied the institutional ethnography approach to designing interview guidelines and analyzed the interaction strategies applied by the instructors in response to the language centers’ requirements from the micropolitics perspective. The following was discovered: 1) Most of the educators “went along” with distinct requirements, whereas some chose to “be noticed” and used strategies, such as sales talk or quid pro quo negotiation, to improve student outcomes. (2) The part-time instructors tended to “keep silent” and were careful to “not cause any trouble” even when they found the requirements to be unrealistic. 3) The “being noticed” strategy was associated with cultural-ideological and professional identity interests. Cultural-ideological interests influence the instructor–student interactions, class management, and tutoring strategies. Professional identity interests enable them to think positively and help students in alternative ways when they encounter a frequent change in the teaching context.