In an attempt to improve the quality of English teaching and learning in Vietnam, recently the Ministry of Education and Training has issued Pilot English textbooks to replace the old ones which have been officially used in the education system since the2000s. In these new textbooks, by the end of every unit comes a project section in which students are required to work in groups to fulfill a project. These project activities aim to help students use the language and skills acquired from the lessons and enhance their learning motivation. However, it is a common practice among Vietnamese English teachers to omit these activities claiming that they are very time-consuming. In the current study, project activities in Pilot English textbook – Grade 10 were implemented with 140 tenth graders in two high schools in Bac Lieu Province of Vietnam. Students’ attitudes toward the benefits and challenges of involving in project-based learning were explored using questionnaires. The study results provide useful implications for high school English teachers, textbook writers and school administrators in Vietnam.