Bob - Thanks very much for responding to Alex's query.
Alex - Bob has given you the very best advice available.
In addition to Art Aungst's book, I would also recommend Lou Tharp's book The Overachiever's Diary
as a good resource. Though Lou wrote this book about his hugely successful experience coaching them West Point Triathlon team (in his first season he took the men and women from 13th and 15th place at Collegiate Triathlon Nationals to 2nd and 3rd respectively) his book gives a detailed day-by-day account of his thinking, his communications with the team, and the practices he gave. It was 100% TI methodology.
One more resource I suggest is visit the Free Stuff
section of the TI digital store and download the Green Zone chart. This will give you guidance on stroke counts to aim for with each swimmer you coach, based on height.
Finally, I suggest you also post your query on the TI Swimming Facebook group.