In this work, we propose an IoT smart classroom framework which will be the base for smart classroom and hybrid teaching applications. The prototype introduces sensor readout capabilities, which can be used to monitor: temperature, humidity, and loudness in a classroom. Furthermore, the prototype introduces capabilities to collect and display measurements. Additionally, this prototype will assist an educator in a hybrid teaching setup by offering additional functionalities. With this prototype, the educator is able to control whether the students online are able to hear physically present students or not. The prototype also introduces a way to notify the educator of any questions from students attending online. The goal of this thesis is to make the first steps to improve the hybrid teaching environment by reducing the workload on the educator and by making it easier for online students to interact with the educator. The project is divided into three submodules. Each submodule designs a different part of the total project. This thesis focuses on the hardware of the system. The hardware that is used for audio recording, audio controlling, question indicating and climate monitoring. The other two subgroups discuss IoT communication, data storing and graphical displaying of data.