This action research attempted to explore how problem-based learning could be applied to help unmotivated students in a practical school in Hong Kong. Data were drawn from 2 Commercial Studies classes of 30 students. Quantitative data regarding students' off-task and active learning behaviors were collected through the use of questionnaires. Besides, observation and interview were conducted to review students' attitude change in learning, and their ability to apply knowledge. The findings showed that problem-based learning enhanced active learning and co-operation among students. There were no data to support the long-term effect of this approach. It was recommended that teacher training, alongside other methods, should focus on student-centered pedagogy and curriculum to help unmotivated students. [Copyright of Hong Kong Special Education Forum is the property of Centre for Special Educational Needs and Inclusive Education, The Hong Kong Institute of Education & Special Education Society of Hong Kong.]