This paper presents the design of an efficient environmental sensor map to be used inside university classrooms. There are a lot of studies presenting the negative effects of air pollution and influences on health, as well as how it affects academic performance of students, but currently there are no monitoring systems of air quality inside academic institutions. This paper proposes a design for an efficient IoT system consisting of multiple interconnected devices that have sensors monitoring levels of air pollution, dust, light, temperature and humidity in classrooms. It also provides real time feedback and emergency alerts, as well as a friendly userinterface with a map of sensors placed in different parts of the classrooms inside universities.