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The research aims to enhance student-s awareness about the environment through project-based learning. In learning process students are expected to solve school environment problems of waste management . The study was conducted on the students of grade X, in one of the Vocational Schools in Bogor for 3 meetings. Students are given worksheet as a guide for designing waste treatment projects. The researcher used six stages according to Doppelt (2004), namely: 1) Design purpose; 2) Inquiry field; 3) Solution; 4) Choosing the preferred solutions; 5) Operation step; 6) Evaluation. Indicators of awareness for the environment used Dunlap and Liere (2000) instruments, including: 1) fragility of natural balance in the school environment; 2) ecological crisis in the school environment; 3) the reality of limited natural resources in the school environment; 4) Anti-anthropocentrism of students in the school environment; 5) rejection of exceptionalism.The results showed an increase of awareness towards the school environment with N-gain score category is medium (N gain= 0,41). Students also appreciate and maintain the school environment.