This study aimed to produce a significant improvement in the educational achievement of Hawaiian preschool children in 2 years, through implementation of a communication program in five preschool classes serving approximately 100 children. The six components of the program were: (1) an enhanced hearing loss and middle-ear disorder and speech disorder screening program; (2) follow up to ensure that screened children received appropriate medical care; (3) reduction of classroom ambient noise levels; (4) amplification of instructional speech to an educationally effective signal-to-noise ratio; (5) special communication-enhancing classroom teaching techniques and equipment for use with children experiencing moderate speech and hearing difficulties; and (6) an individualized home and school communication therapy program for children needing it. Although not all the proposed interventions were successfully implemented, the program results indicated that the experimental group children showed nearly 25 percent more growth on verbal and quantitative achievement test scores than those in the comparison group. The intervention procedures are detailed and the full findings are presented in textual and graphical forms. (10 references) (DB)