This study determined the effect of a sound field amplification system on teacher movement in physical education (PE) settings. Two middle school PE teachers instructing coeducational PE classes were used as the subjects. This investigation used a multiple-baseline single-case design across subjects. The treatment (independent variable) was the teacher using a portable sound field amplification system. The results indicated consistency in the increase of teacher movement for all classes when amplified feedback was implemented, which suggests that the treatment was effective.