Hi @RachelLantz,

If you're using the New Quizzes option in Canvas, you can accomplish this by setting an accommodation for the student.  The accommodation will apply to all new quizzes in the course for that student.

If you're using classic quizzes, there is no course-level option to apply to all quizzes and you'd have to go quiz by quiz setting a moderation option.

Hope this helps!

-Chris