I am looking for a few good instructional dvds/tapes of katas for my son. I have been searching around, and I'm not quite sure which style he is learning. Several of the kata names appear in several different styles. His first kata is Fu-Ku-Gata-Ichi, then Fu-Ku-Gata-Ni, Pinan-Sho-Dan, Pinan-Ni-Dan, Pinan-San-Dan, Pinan-Yon-Dan, Pinan-Go-Dan, Shodan-Heian and about 17 more.