[IEEE 2019 Joint 8th International Conference on Informatics, Electronics & Vision (ICIEV) and 2019 3rd International Conference on Imaging, Vision & Pattern Recognition (icIVPR) - Spokane, WA, USA (2019.5.30-2019.6.2)] 2019 Joint 8th International Conference on Informatics, Electronics & Vision (ICIEV) and 2019 3rd International Conference on Imaging, Vision & Pattern Recognition (icIVPR) - Challenges for data collecting of teacher and student' behavior in different types of class using video and wearable device