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12 student teachers for the joint purpose of obtaining data to investigate the problem identified above and to obtain other performance feedback for students who had previously completed a methods and materials experience in elementary science and social studies. Although the student teacher advised the investigators of several possible times when they would be teaching science and/or social studies, the student teachers were not told in advance which of the time options would be utilized for a visit. The specific investigation reported here was not discussed with the student teachers before all data were obtained. It was not announced in advance that a tape recorder would be utilized during the visits, but this device is frequently used by University faculty supervising field experiences. The recorders, which have built-in microphones, were located in an inconspicuous position in the classroom.

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691The scale on the larger wheel could represent the chords of the old progression and then the scale of the new progression would be on the smaller wheel. Line up the symbol of the old key (on the large disc) with the symbol of the new key (on the small disc). Now all the chords used in the old key will line up with the chords to be used in the new key.