The average teacher salary at Merkel Isd was $45,250 , which is 29 percent lower than the average salary for this job in Texas, and 31 percent lower than the national average for this job . Teacher salaries at Merkel Isd typically range from $39,395 to $50,078 (25th to 75th percentile). The highest reported teacher salary was $74,540. There are 96 employees at Merkel Isd with the job title teacher.