Scoliosis Instructor

I am scheduled to conduct spinal screening in a few weeks but the Lead is having difficulty getting subs. I have been doing spinal screening for going on 8 years. In the past we trained the PE teachers and Ath. Trainer to screen boys. I was told I need to be an instructor. I called the Texas Dept of Health where they are over spinal screening as was told I have to wait until this nurse comes back in 2 months. I think this should be online and more acessible to RNs. I could easily get teacher subs than NA subs. Any educators or school nurses with ideas on this dilemma?