title: create register page with different roles in drupal 7
body: <p>I have a system has 2 roles (teacher and student) the student can register straightforward as in drupal.
  the issue now: I need the teacher to register with teacher role but the account status by default be inactive then the system admin activate it (request to join form).</p>
  
  <p>is this applicable in drupal? </p>