The computer-supported Project Work classroom learning environment discussed in this paper represents a paradigm shift from teacher-centered to student-centered teaching and learning in Singapore schools. Besides the face-to-face weekly lessons in existing Project Work classrooms, the students engaged in computer-supported online forum discussions. Two hundred and sixty students and 26 teachers from seven high schools participated in this study. Their perceptions of this new learning environment were assessed using a modified version of the Web-based Learning Environment Instrument (WEBLEI). In addition, the instrument was also validated. The WEBLEI exhibited satisfactory internal consistency reliability and discriminant validity. Comparing the actual and preferred perceptions of the students and teachers revealed that there were differences between the actual and preferred perceptions for both students and teachers. With these in mind, the implications for using technology to support the face-to-face teaching and learning in Project Work classrooms are discussed in this paper. (Contains 2 tables and 1 figure.)