The Constructivist Learning Environment Survey is an instrument used for assessing students' and teachers' perceptions of their learning environments. The Teacher Constructivist Learning Environment Survey (TCLES) was created to better enable teachers and researchers to determine teachers' perception of their use of constructivist approaches in their classrooms. This article reports the development and validation of a modified Turkish version of the TCLES with 449 teachers chosen randomly from primary schools in Turkey. The validity of the TCLES was investigated by means of explanatory and the confirmatory factor analyses, whereas the Cronbach alpha coefficient was used to assess the internal consistency of the scales. The factor analyses were carried out to check the factor structure of the Turkish adaptation of TCLES. The factor analysis revealed that the Turkish adaptation of the original survey consisted of 30 items with the same six-scale structure as the original survey.