Given the recent update to Keynote, you might be wanting your students to utilize it. You can now export as GIF and add motion path. These new abilities make a great app even better. If you are using Google Classroom, you'll need to utilize the app as well as the Google Drive App. To add Keynotes to your Google Classroom, you'll have to access your FILES app on your iPad. For a quick guide, click here.
Use the video above if you need to help your students open the Keynotes that you distribute from your Google Classroom.