The purpose of this study was to modify and validate a new form of the College and University Classroom Environment Inventory (CUCEI), and to then use it to compare students' actual and preferred perceptions of their classroom learning environments at the senior secondary and tertiary levels of education. The study also examined differences in perceptions according to the student's gender. A sample of 504 students participated in the study. The reliabilities of the scales of the modified CUCEI ranged from .73 to .94. When the two levels were compared, students at the higher education level had a less favourable perception of their learning environment. Previous research was replicated in that females were found generally to perceive their learning environments in a more positive way than did males and that all students generally preferred a more positive learning environment in their classes.Despite the fact that educational environment is a somewhat subtle concept, remarkable progress has been made in conceptualising, assessing and researching its determinants and effects. Research over the last four decades has recognised that students' and teachers' perceptions are important parameters of the social and psychological aspects of the learning environments of school classrooms (Fraser, 1994(Fraser, , 1998. The foundation of the study of classroom environments was laid independently by Rudolf Moos and Herbert Walberg. Walberg's model on educational productivity indicates nine factors which contribute to the variance in students' cognitive and affective outcomes. The nine factors being student ability, maturity, motivation, the quality of and quantity of instruction, the environment at home, the classroom environment, the peer group outside the classroom and the time involved with the video/television media (Walberg, 198 I, 1984). The model was successfully tested as part of a national study showing that student achievement and attitudes were influenced