In 2008, there were about 3.5 million kindergarten, elementary, middle and high school teachers in the country, so we can expect almost another 500,000 to be hired by 2018. Also indicative of the high demand for teachers is the large volume of grants available for teachers.
Another option is to mix small amounts of apple cider vinegar with the animal's drinking water; consuming this solution is known to change the blood pH of the horse, thus keeping horseflies away. Cider vinegar, coupled with essential oils, is also used in home sprays as the sharp odor may repeal horseflies.
Generally, horse flies don't bite people. However, if you're stung by a horsefly, wash the wound with soap and water. Press a ball of gauze dabbed in ethyl alcohol on the wound. Keep an eye on the swelling in case it gets worse due to allergy or infection.