This paper presents the results of an extensive Post Occupancy Study of 15 schools in the city of Campinas, SP, Brazil. The learning environments were analyzes as to environmental comfort conditions and possible simple solutions to improve the quality of the learning environment. Classrooms and recreation areas were observed and critical comfort conditions were measured with equipment. School directors, teachers, employees and students were questioned as to their perception and evaluation of the comfort conditions and given the opportunity to express their satisfaction and desires about their learning spaces.