class bbg_user_meta {

     function bbg_user_meta() {
         if ( is_admin() ) {
             add_action('show_user_profile', array(&$this,'action_show_user_profile'));
             add_action('edit_user_profile', array(&$this,'action_show_user_profile'));
             add_action('personal_options_update', array(&$this,'action_process_option_update'));
             add_action('edit_user_profile_update', array(&$this,'action_process_option_update'));
         }

     }

     function action_show_user_profile($user) {

     $is_teacher = (get_the_author_meta('acct_type', $user->ID) == 'teacher' ? true : false );
?>
         <h3><?php _e('Account Type') ?></h3>

         <table class="form-table">
            <tr>
                <th><label for="acct_type"><?php _e('Account type'); ?></label></th>
                    <td>
                        <select name="acct_type">
                            <option value="teacher" <?php if ( $is_teacher) : ?>selected="selected"<?php endif; ?>>Teacher</option>
                            <option value="student" <?php if ( !$is_teacher) : ?>selected="selected"<?php endif; ?>>Student</option>
                        </select>


                    </td>
            </tr>
         </table>
<?php
     }

     function action_process_option_update($user_id) {
         update_usermeta($user_id, 'acct_type', ( isset($_POST['acct_type']) ? $_POST['acct_type'] : '' ) );
     }
}
/* Initialise outselves */
add_action('plugins_loaded', create_function( '', 'global $bbg_user_meta_instance; $bbg_user_meta_instance = new bbg_user_meta();' ) );