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.
It depends on the instructor, on the barn, on the area, on the instructor's experience. One riding instructor might get $25 for giving a one hour ride, another might get $200 a rider for 45 minutes up to one hour.