The average aide salary at Ballwin Elem. was $49,850 , which is 116 percent higher than the average salary for this job in Missouri, and 54 percent higher than the national average for this job . Aide salaries at Ballwin Elem. typically range from $41,844 to $62,215 (25th to 75th percentile). The highest reported aide salary was $116,087. There are 10 employees at Ballwin Elem. with the job title aide.