Complete all the levels of the Try R tutorial on codeschool.com before class begins on Tuesday, January 30th. After you complete the interactive tutorial, you will receive a certificate of completion.
It is recommended that you sign up for an account before starting, as this will let you save your progress.
Take a desktop screenshot of the certificate (Print Screen button) and send it to Dr. Glasbrenner as a Slack Direct Message. The screenshot should show some sort of identifiable information. For example, open a small notepad window and type your name there, like this: