Hello @AngelaGray
Thank you for contacting the Instructure Community. How did you share the quiz exactly? Exported and them imported or you added the teacher to your course and they copied it over themselves? There is a good likelihood that the question banks weren't brought over with them if they appear but completely empty. Depending on how you shared the quizzes, it will determine how to get them the questions themselves. If the teacher was added to the course have them follow these steps:
First go to the homepage, on the right - import existing content, copy a canvas course, select specific content, import. Then, click awaiting selection and ONLY check the "question banks" option. Here is the guide to importing content: How do I copy content from another Canvas course u... - Instructure Community
If that doesn't work, then you may want to contact Canvas Support directly and they can take a look at the course, quizzes, etc.
How do I contact Canvas Support? - Instructure Community