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Environmental damage in various places requires concrete steps to be resolved. The purpose of this research is to make environmental awareness work for Elementary Shool Pre-Service Teacher through outing class activities. One Group Pre test post test design is used as a method of this research. The instruments used are environmental awareness questionnaires that have been adapted. Obtained a gain score of 0.6 from environmental awareness, indicating that outing class activities are effective to increase environmental awareness of elementary school teacher students. An in-depth study is required to modify outing class activities in enhancing environmental awareness.