This online course is designed to work on all of the major modern web browsers (Internet Explorer, Chrome, Safari, and Firefox).
You can come back to this course 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 may opt for receiving a certificate for completing the course. Cornell University does not offer academic credit for this course.
Need help? Email firstname.lastname@example.org