school-platform/app/views/conversations/index.html.erb

<% provide(:title, "Conversations") %>
<h1>Conversations</h1>
<table width="100%" class="table table-striped table-bordered table-hover">
  <thead>
    <tr>
      <th>
        Conversation
      </th>
      <th>
        Participants
      </th>
      <th>
        Last message
      </th>
    </tr>
  </thead>
  <tbody>
    <%= render @conversations %>
  </tbody>
</table>
<%= link_to "New conversation", new_conversation_path, class: "btn btn-primary btn-lg btn-block" %>