Turnitin have released a new version of their IOS app: Turnitin Feedback Studio for iOS.
Rather than generating access code, you can now request a link to be sent to your email address which need to be accessed via your iPad.
See the following instructions on how to add a class to the Feedback Studio for iOS app:
2. Enter and confirm your email address and Select the Email Me button:
4. Access your email on an iOS device that has the most up-to-date version of the Feedback Studio for iOS app installed (this is important!).
5. From the email, select the Add Class button.