Automatically create page and assign a page template to it....

functions.php

<?php 
$awesome_page_id = get_option("awesome_page_id");
    if (!$awesome_page_id) {
    //create a new page and automatically assign the page template
    $post1 = array(
    'post_title' => 'Awesome Page!',
    'post_content' => "",
    'post_status' => "publish",
    'post_type' => 'page',
    );
    $postID = wp_insert_post($post1, $error);
    update_post_meta($postID, "_wp_page_template", "school.php");
    update_option("awesome_page_id", $postID);
?>