The Education has been considered a tool to bring a desired social change in the society, and to achieve this goal Curriculum is the right instrument. This research study was conducted to assess integrated environmental education principles within the school curricula. This study main objective was to analyze the four basic components of the curricula: aims, material, teaching methods and assessment. This research was delimited to the region of Punjab and Islamabad and Class 1-10 high school level. A sample of 370 teacher and 3550 students was selected using Stratified random sampling technique. The researcher personally visited the local areas of Islamabad, Attock Mianwali and Sheikhupura to collect the data. Descriptive statistics were used to analyze the collected data. The statistical analysis of the test revealed that cognitive domain of the students and the teachers had shown significant improvement, however there was no significant difference in the attitudinal domain.