This book investigates the extent to which Constructivist Learning Environment (CLE) aspects exist in primary level 4th and 5th grade Science and Technology Courses in Turkey as perceived by students and their teachers. Secondly, the book aims at finding out whether perceptions of students on CLE differ according to certain demographic variables. Finally, the book attempts to explore the extent to which the perceptions of teachers on administrative support have a relationship with their perceptions on CLE. Subjects of the study involved 1143 primary level 4th and 5th grade students in Turkey during 2006-2007 school year from 6 socio-economic development groups as determined by State Planning Department and their 264 teachers. The results indicated that students and teachers perceived the current learning environment to be often constructivist; perception of CLE differed according to socio economic status and technology use of students; there is a significant but low correlation between teachers’ perceptions on CLE and their perceptions on administrative support they received.