The average aide salary at Middle Sch. was $37,580 , which is 63 percent higher than the average salary for this job in Missouri, and 16 percent higher than the national average for this job . Aide salaries at Middle Sch. typically range from $38,430 to $45,330 (25th to 75th percentile). The highest reported aide salary was $45,930. There are 6 employees at Middle Sch. with the job title aide.