The average aide salary at Dexter High was $40,744 , which is 76 percent higher than the average salary for this job in Missouri, and 26 percent higher than the national average for this job . Aide salaries at Dexter High typically range from $39,092 to $47,180 (25th to 75th percentile). The highest reported aide salary was $55,942. There are 9 employees at Dexter High with the job title aide.