The aim of this quantitative study was to investigate the perceptions of Mathematics teachers working in Abha city, Saudi Arabia, toward using IoT in Mathematics classes for students' acquisition and performance. The sample was selected using the simple random sampling technique, and the researcher collected data using a self-developed scale. The analysis revealed that Mathematics teachers' perception of using IoT is high and integrating IoT in the classroom can improve student participation and help them become more skilled. Also, the findings showed that most of the participants in the survey believe that IoT is a field that is well-equipped to operate effectively. The Pearson correlation coefficient showed a strong and positive relationship between teachers' perception of using IoT and students' concept acquisition and academic performance. Owing to the vast range of study implications and its ability to boost students' performance and acquisition of new Mathematical concepts, IoT must be implemented in the classroom.