The average aide salary at Mathews Elem. was $29,206 , which is 26 percent higher than the average salary for this job in Missouri, but 10 percent lower than the national average for this job . Aide salaries at Mathews Elem. typically range from $23,150 to $42,677 (25th to 75th percentile). The highest reported aide salary was $43,518. There are 5 employees at Mathews Elem. with the job title aide.