As a high school coach, it was helpful, informative and very effective to watch the Mark swim the drills while they were explained then have the instructors watch as the swimmers ran the drills. I thought 4 drills per stroke was a great use of time and they were taught clearly. Having a visual to learn from before doing the drills themselves then stopping between sets to adjust their technique was extremely helpful. I learned from watching both Mark and all the swimmer run through the drills in their different skill levels.