In order for your teacher to give you feedback using Kaizena, they need to have permission to edit your file.
If you're using Google Classroom, all you need to do is submit your file on Google Classroom!
If you are not using Google Classroom, you may need to give your teacher "Edit" permissions yourself. Here's how to do that:
Open your Google Doc.
Click the blue "Share" button in the top right corner:
3. Enter your teacher's email in the box that pops up:
4. Make sure the button to the side says "Editor":
5. Finally, click "Send":