The average aide salary at Lamar Middle was $37,897 , which is 64 percent higher than the average salary for this job in Missouri, and 17 percent higher than the national average for this job . Aide salaries at Lamar Middle typically range from $38,600 to $40,640 (25th to 75th percentile). The highest reported aide salary was $47,250. There are 6 employees at Lamar Middle with the job title aide.