Most teaching pedagogies in English as a Foreign Language (EFL) classes prioritize linguistic skills development over exploring how cultural factors shape language interpretation. To address the gap, this study developed and evaluated an instructional design project using the attention, relevance, confidence, and satisfaction (ARCS) motivational design model combined with critical pedagogy through computer-mediated communication (CMC) tools. The purpose of this research is to enhance EFL teachers' intercultural competence. Multimedia resources were used to capture participants' attention, and news articles were selected to connect to their lived experiences. Online forums were used to build their confidence, and intercultural activities provided satisfaction through practical engagement. Critical literacy pedagogy guided the design of questions to encourage EFL teachers to explore assumptions, challenge perspectives, and critically analyze language. Data from 16 EFL teachers' questionnaires, online comments, and interviews indicated that task attractiveness and the online environment motivated EFL teachers to develop critical literacy skills. Future studies could explore additional strategies for integrating intercultural competence into EFL teaching and examine how cultural dynamics within groups influence online communication.