app/views/mypage/index.html.erb
<h2>Enter your student number and email address to see your course feedback</h2>
<p class="error"><%= notice %>
<% if not notice.nil? and notice!="enter your student number and email address" %>
<%= link_to "registered", "/register" %>
<%= "to the course?" %>
<% end %>
</p>
<%= form_tag('/tktl-labtool/mypage', :method => :post) do -%>
<table style="border: none">
<tr style="border: none">
<td style="border: none">student number</td>
<td style="border: none"><%= text_field_tag 'student_number', session[:student_number] %></td>
</tr>
<tr style="border: none">
<td style="border: none">email</td>
<td style="border: none"><%= text_field_tag 'email', session[:email] %></td>
</tr>
</table>
<%= submit_tag 'start!', :class => "small-button" %>
<% end -%>