A team at the University of Nebraska-Lincoln is currently engaged in a comprehensive study of indoor environmental conditions in K-12 classrooms. Information about the indoor air quality, thermal comfort, lighting, and acoustic conditions have been collected from 220 classrooms across five school districts in Nebraska and Iowa. This paper will present an overview of the acoustic results with regards to sound levels and reverberation time as well as how these results vary based on grade level and school district. This paper will also present an initial overview of the relationship between acoustic metrics and some of the metrics from indoor air quality, thermal comfort, and lighting such as carbon dioxide levels, temperature, and electric illuminance levels. [Work supported by the United States Environmental Protection Agency Grant Number R835633.]