anchor.diff:                    <%= link_to activity_path(activity), class: "btn btn-primary" do %>
                       <i class="glyphicon glyphicon-eye-open"></i>
                     <% end %>
  -                </td>
  -                <td>
  -                  <%= link_to edit_activity_path(activity), class: "btn btn-info" do %>
  -                    <i class="glyphicon glyphicon-pencil"></i>
  -                  <% end if activity.teacher_id == @current_teacher.id %>
  -                </td>
  -                <td>
  -                  <%= link_to activity_path(activity), method: :delete, class: "btn btn-danger" do %>
  -                    <i class="glyphicon glyphicon-trash"></i>
  -                  <% end if activity.teacher_id == @current_teacher.id %>
                   </td>
                 <% end %>
                 <% if @current_student.present?  %>
  
positive.code:           <th>Permission Slip?</th>
            <% if @current_teacher.present? %>
              <th>View Activity</th>
              <th>Edit Activity</th>
              <th>Delete Activity</th>
            <% end %>
            <% if @current_student.present? %>
              <th>View Activity</th>
  
negative.code:               <td><%= activity.start %></td>
                <td><%= activity.end %></td>
                <td><%= activity.location %></td>
                <td style="text-align: center;">
                  <% if activity.permission_slip %>
                    <span class="glyphicon glyphicon-ok" aria-hidden="true"></span>
                  <% else %>
  