Indoor environmental quality in educational institutions has a significant impact on students’ health, cognitive performance, and overall well-being. Smart sensor technologies offer an effective solution for real-time, automated monitoring of critical environmental parameters such as temperature, humidity, carbon dioxide (CO?), particulate matter (PM), light intensity, and noise levels. This paper presents an overview of smart sensor systems and their communication interfaces, focusing on their application in school environments. Smart sensors integrate sensing units with onboard signal processing and communication capabilities, enabling autonomous data acquisition, pre-processing, and transmission to centralized or cloud-based platforms. The study explores both wired and wireless communication protocols, comparing them based on power consumption, data rate, coverage, and suitability for deployment in school infrastructures. Additionally, the integration of Internet of Things (IoT) frameworks facilitates scalable and remote monitoring, supporting data-driven decision-making for improving classroom conditions. This work highlights the potential of smart environmental monitoring to enhance learning environments, reduce health risks, and support energy-efficient school building management through reliable and continuous sensing systems.