The recurrent problem among Vietnamese high school students in learning English is the ability to communicate effectively in the target language. The question of how to motivate students to speak English confidently and effectively has driven the researcher to search and experiment with various pedagogical techniques. Therefore, this study is conducted to investigate to what extent using role play can increase students’ motivation in EFL speaking classes. The role play technique has been implemented with a group of 33 Math-majored students at a specialised high school in Vietnam. Data collected from observation notes and interviews with 6 student participants revealed that students’ motivation to speak English was high. The results also indicate that role play can be fruitfully deployed in EFL-speaking classes to increase students’ engagement in language production.<p> </p><p><strong> Article visualizations:</strong></p><p><img src="/-counters-/lit/0758/a.php" alt="Hit counter" /></p>