The average aide salary at Tarkio Elem. was $39,037 , which is 69 percent higher than the average salary for this job in Missouri, and 21 percent higher than the national average for this job . Aide salaries at Tarkio Elem. typically range from $35,044 to $43,794 (25th to 75th percentile). The highest reported aide salary was $46,894. There are 6 employees at Tarkio Elem. with the job title aide.