|Brian Baker's backhand volley|
Already I am thinking it will be tough to feed at such a consistently specific rate per round per student, but my students really enjoyed the Tornado volley drill so I will give this one a try as well. I'll let you know how it goes.
UPDATE: My fears about consistent feed rates were unfounded, mainly because I reduced it from four to three rounds: slow, medium, and Lightning. This has turned into a great volley instruction tool. When the students see how difficult it is to perform at Lightning round pace properly, they are ready to listen to some tips on proper volley and recovery technique.