I have taught at CC’s for 13 years. Deep in larger out-door pools always goes over well~ provided equipment is available and the class participants are able. I also enjoy teaching aqua KB: multi direction kick, step, lunge w/jack choreography and punching w/aquabells. Besides what is listed, check out Karen Westfall (water works) and Craig Stuart. ESP noodle video is intervals of strength, cardio, and suspension w/some aqua plyos mixed in. Simple choreography w/speed changing and interval work always seems to fly well since this challenges fit pp and seniors. If hot pool ie: MS or Arthritis: check out Ai Chi (AEA) or Aqua Tai chi. Pilates can also be done deep or shallow. Dance in the water is also popular some places for seniors. Hope that helps.