Write examples to illustrate homophonic texture. Take special care to assure that your design plan positively differentiates the three "roles" (melodic line, rhythmic accompanimental design, and chordal sustaining material). In the sustaining choir, chords do not always need to be full; sometimes a single sustained tone will suffice. Use percussion freely, as it is very
effective as part of the accompanimental pattern and can even simulate sustaining effect by continuing the sounds of timpani and certain gongs and cymbals with a "roll" (by using soft sticks).
For concentrated practice use four staves, as in the above example. This will keep the contrasted action of the basic elements clearly before you as scoring proceeds.