The average aide salary at Willard Middle was $42,379 , which is 83 percent higher than the average salary for this job in Missouri, and 31 percent higher than the national average for this job . Aide salaries at Willard Middle typically range from $37,840 to $47,737 (25th to 75th percentile). The highest reported aide salary was $66,138. There are 12 employees at Willard Middle with the job title aide.