â The presence of marijuana is detected by a drug test through the presence of the active chemical THC or Tetrahydrocannabinol. Technically, what is detected is known as THC-COOH (11-nor-delta-9-tetrahydrocannabinol-9-carboxylic acid).
1 Average Riding Instructor Salary: Independent riding instructors typically charge an hourly rate for services but on average earn about $35,000 to $39,000 per year.
Driving school instructors earned average annual salaries of $37,000 as of 2013, according to the job site Indeed. The minimum requirements for this job are a high school degree and two years of driving experience.or example, a driving school instructor who earns $35,000 in Peoria, Ill., would need to make $82,432 in New York City to enjoy the same living standard, according to CNN Money's cost of living calculator. In Washington, D.C., that individual would need to earn $53,988.