This booklet explores classroom acoustics and their importance on the learning potential of children with hearing loss and related disabilities. The booklet also reviews research on classroom acoustics and the need for the development of classroom acoustics standards. Chapters examine: 1) a speech-perception model demonstrating the linkage between classroom acoustics adequacy and the development of a speech and language system, 2) the benefits of improving classroom acoustics by removing current acoustic barriers, 3) procedures for evaluating, measuring, and modifying noise and reverberation levels in the classroom environment, and 4) acoustic, technological, and rehabilitative solutions for improving classroom acoustics and speech perception in the classroom setting. References follow each chapter. (GR)