This study aims to investigate the use of Community of Inquiry (CoI) based blended learning approach to enhance students_ Vocabulary Test Scores (VTS) and Vocabulary Learning Motivation (VLM) in Chinese secondary vocational EFL classroom. It utilized an explanatory sequential mixed methods approach and a quasi-experimental research design. A series of instruments including a Diagnostic Test, a researcher-developed Vocabulary pre-test and post-test, CoI and VLM questionnaires were employed to gather quantitative data while a semi-structured interview to gather qualitative data. A total of 86 first-year students at a Technician College with two campuses in Chongqing, China were allocated to an experimental group (n = 44) and a control group (n = 42) using a purposive sampling method. Results from the quantitative findings revealed that 1) there is a significant difference between the experimental and control groups after the CoI-based blended learning intervention in terms of students_ V.....

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