The OTC, is the Olympic Training Center in Colorado Springs. You can take classes on line or attend a local college while gray shirting. The RTCs are regional training centers located around the country. This is a model that was put into motion when Zeke Jones was the world team head coach with the purpose of extending high level training for the Olympic styles to other areas of the country to elevate the USA in those styles. (Mission accomplished) RTCs are strictly for training purposes and have nothing to do with the schools. The NLWC is not affiliated with PSU. You must meet a certain criteria to train at these facilities. Example: HS state champion, FARGO placer etc.