In present societies, occupants spend most of their time indoors. Students spend 80% of their time in educational buildings then other types of a commercial building complex apart from at home prominence the significance of adequate internal thermal settings in the learning structures. The thermal conditions are connected to human comfort, building efficiency and energy conservation. In this study, Adaptive model is used to evaluate the heat balance approach for the naturally ventilated buildings. The adaptive approach that showed the connection among comfort temperature Tc and outdoor temperature to. The selected sample for the research is small-sized plots of schools of organi town Karachi. This adaptive model of Humphreys and Nicol is used to identify the comfort zone in naturally ventilated school buildings. The research method is based on mapping, field documentation, and quantitative measurements of inside and outside temperature and humidity levels. The aim of this research is to documentation of architectural parameters and analysis of indoor thermal performance of selected cases for providing the better working and learning environment.