A great option for adding variety to a CrossFit class is utilizing KB for loading instead of a barbell or dumbell. There is a bit of a learning curve with moving a kettlebell efficiently, so it’s smart to first master the basics with the barbell and dumbbell since they are what is primarily used in gyms anyways.
My favorite way to implement kettlebells is having athlete perform movements within in the front rack. If the kettlebells are held properly in the front rack (not on the shoulders) the trunk gets challenged to a much higher degree. This is convenient because the athletes doesn’t need to use as much load as they would have to with a barbell to make the movement. Making it a great option for a deload as well.