The effectiveness of using english as the sole medium of instruction in english classes: student responses and improved english proficiency

This longitudinal action research study investigates the effectiveness of English as the sole medium of instruction in Hong Kong by comparing the preferences of two non-native English language classes under two different teaching policies, while also examining both classes for any potential correlations with improved English proficiency. In one English class, an English-only policy was strictly enforced, while in the second class the use of Cantonese (the students' first language) was permitted. Results revealed that not only did the class under the strict policy have a stronger preference for English as the sole medium of instruction, but their English proficiency had also become higher than that of the more Cantonese-tolerant class.