The average teacher salary at South Middle was $50,160 , which is 12 percent lower than the average salary for this job in Missouri, and 23 percent lower than the national average for this job . Teacher salaries at South Middle typically range from $37,705 to $62,421 (25th to 75th percentile). The highest reported teacher salary was $114,199. There are 120 employees at South Middle with the job title teacher.