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app/models/competition_team.rb

@@ -5,7 +5,7 @@ class CompetitionTeam < ActiveRecord::Base
 
   has_many :team_members, :dependent => :destroy
   has_many :members, conditions: 'team_members.is_teacher = 0', class_name: 'TeamMember'
-  has_many :teachers, conditions: 'team_members.is_teacher = 1', class_name: 'TeamMember'
+  has_many :teachers, conditions: 'team_members.is_teacher = 1', class_name: 'TeamMember', :order => "team_members.role ASC"
   has_many :competition_scores, :dependent => :destroy
   # team_type  0：组队  1：个人
   # attr_accessible :invite_code, :name, :team_type