anchor.diff:  <table class="table table-hover table-center">
     <thead>
     <tr>
  +    <th>No.</th>
       <th style="text-align: left">Tutor Name</th>
       <th># Marked</th>
       <th># Students</th>
  
positive.code:   </tr>
    </thead>
    <tbody>
    <% @tutors.each do |tutor| %>
        <tr>
          <% summary = @summaries[tutor.id] %>
          <td style="text-align: left"><%= tutor.name %></td>
          <td><a href="<%= course_staff_monitoring_path %>?_tutor_id=<%=tutor.id%>"><%= summary[:count] %> </a></td>
  
negative.code:       </tr>
    <% end %>
    </tbody>
  </table>
  