Wordpress - Override default url for author pages?
You can add this in your functions, and it will rewrite the slug from default "author" to "classroom",
function new_author_base() {
global $wp_rewrite;
$author_slug = 'classroom';
$wp_rewrite->author_base = $author_slug;
}
add_action('init', 'new_author_base');
hope it helps you
You might wish to try.. http://wordpress.org/extend/plugins/custom-author-base/
Hope that helps.. ;)