Out-of-doors instruction and the use of outdoor classrooms to allow children to learn directly from the natural environment, as well as about it, are encompassed in this pamphlet. It is intended as a source of ideas for developing and using outdoor classrooms on school sites of any size wherever they are located. Included is an explanation of how to start development of an outdoor classroom, how to prepare a plan for the most comprehensive use of the school site, and where to get professional help in applying conservation practices that will improve learning opportunities. In addition, numerous pictures and brief descriptions suggest ideas for actual studies in the outdoor classrooms. (BL)