The average aide salary at Mckelvey Elem. was $54,478 , which is 136 percent higher than the average salary for this job in Missouri, and 68 percent higher than the national average for this job . Aide salaries at Mckelvey Elem. typically range from $43,998 to $68,750 (25th to 75th percentile). The highest reported aide salary was $84,450. There are 6 employees at Mckelvey Elem. with the job title aide.