The Honolulu (Hawaii) Symphony Orchestra's commitment to education includes young people's concerts and in-school ensembles. The purpose of this booklet is to enhance the educational potential of in-school concerts through the presentation of information about the orchestra and music related concepts. Part 1 describes the orchestra's personnel, the in-school ensembles' purposes and compositions, and the differences between orchestras and ensembles. Part 2 explains: (1) audience responsibility and listening skills; (2) ensemble instruments in terms of the string, woodwind, brass, and percussion families; and (3) suggested elementary level pre-concert and post-concert class activities. Part 3 contains a source list for obtaining pictures of musical instruments, along with an annotated list of 12 films, recordings, filmstrips, and books that can be used as resource materials. Pictures of musical instruments are included. (JHP)