<% for user in users %> <% if current_user.is_administrator_at?(@course.school) || current_user.admin? %> <% end %> <% end %>

<%= render user %>

<%= form_for @course.course_participations.find_by(user_id: user.id), html: { method: :delete } do |f| %> <%= f.submit "Remove", class: "btn btn-danger" %> <% end %>