The filtering actually doesn’t use AJAX, but just a simple JavaScript snippet that refreshes the page to a new URL. The new email reminders system that we’re adding on will be using AJAX though, and we’ve used AJAX in earlier revisions of the system too.

We’re always glad to get feedback on Gradefix, and especially that people find it a useful tool for their school work. We’ve been surprised by how quickly people have picked up on it since we launched about 10 weeks ago. We have users in at least 20 countries now, spread all over the world, and students from colleges and universities, high schools, junior high, and even elementary schools.

If you have other feedback for us that could help improve Gradefix, we’d love to hear it. Our email address is at http://www.gradefix.com/contact.php.

Thanks again,
Mac