2018 No https://www.sciencedirect.com/science/article/abs/pii/S0048969717335520 Finell Europe Observational Students Middle/Jr High (6-8) High School (9-12) Fungi Indoor air quality School climate Teacher-student relationships We found that the teacher-student relationship was reported to be worse in schools with observed indoor air problems. Furthermore, the reported class spirit was worse in schools with observed indoor air problems, but only among students with a high grade point average.