The results from part C of the questionnaire concerning perceptions about collaboration had the highest average score (4.43). This can indicate that students regard PBL as having positive effects on improving their collaborative learning and working. The findings also corroborate with Srikrai (2008) which pointed out that the participants of the project learn to work cooperatively with their classmates. However, the data from student’s interview doesn’t explain much on what manner PBL improve their collaborative skills.From the interviews with high-rater questionnaire respondents, student B, who performed well in the projects, expressed her feeling that she enjoyed doing the projects as she can improve her English as well as benefit her community.