Sound/color rectangles chart
This chart contains a number of different coloured rectangles; each colour corresponds to a sound in the language. The colour code is the same as that of the Fidel (spelling charts) and Word Charts.
A skilful teacher can use the chart to help students to work with precision on the fine phonetic distinctions of the language in question. The teacher and the students touch rectangles and sequences of rectangles with a pointer and the students produce the corresponding sounds. The movements of the pointer guide the students to refine their capacity to produce the sounds of the language with the melody and rhythm necessary. It is this capacity to produce the sounds themselves which will lead to their being able understand the spoken language.
Donald E. Cherry's students working with a modified rectangle chart.