Conformation, shows, and riding schools

Hello yet again, its been a while. I cannot remember these things, can some one please tell me if there is a correlation between showing and conformation? If so, please remind me what that correlation is. Also what would be considered a horrible show horse? I would like to have a few that I use specifically for the riding school and nothing else.

Conformation has no impact on showing at all. 

Horses with over 70 non-speciality stats (aka foundation level) tend to be pretty terrible at showing depending on discipline and level, so anything above that I would personally riding school. Showing benefits do outweigh school benefits in the long run. 

Thanks for the info! You have been most helpful! :)