Ajax functionality not being called under wordpress plugin

Syntax error comes from your js file that is containing php code. You don’t need this part to be in the js file and need to be in a php file.

<?php 
function form_ajax_process_request() {
    if( isset( $_POST["post_var"] ) ) {
        $response = $_POST["post_var"];
        echo $response;
        die();
    }
}

add_action('wp_ajax_form_response','form_ajax_process_request');
add_action('wp_ajax_nopriv_form_response','form_ajax_process_request');
?>

This part need to be in school_core.php (without <?php and ?>).