This course is designed to work on all of the major modern web browsers (Internet Explorer, Chrome, Safari, and Firefox). iPhones and iPads will not show the Flash-based interactive elements.
You can come back to this tutorial as much as you like. We do not guarantee that we will maintain the site forever, but you will retain access as long as it remains online.
You’ll earn digital badges by making progress in this course and can choose to earn a printable certificate by passing the final quiz. Cornell University does not offer academic credit for this tutorial.
Need help? Email firstname.lastname@example.org