anchor.diff:  <div class="container">
     <div class="row">
  -    <div class="col-md-1"></div>
       <div class="col-md-6" style="padding-top: 5%;">
         <h1>Welcome, <%= @teacher.full_name %></h1>
         <h3>Currently teaching courses on:</h3>
  
positive.code:       <% end %>
        </ol>
      </div>
      <div class="col-md-5"></div>
    </div>
  </div>
negative.code:           <h4><%= link_to "add a section for this course", new_teacher_class_path(@teacher, :course_section => { :course_teacher_assignment_id => course_teacher_assignment.id }) %></h4>
          </ul>
        <% end %>
        <h3><%= @teacher.first_name %>'s classes:</h3>
        <ol>
        <% @teacher.course_sections.each do |course_section| %>
  