Hello  @rbrimfield  Welcome to the Canvas Community.  Thanks for posting your question.  Depending on how your course is set up, there are a few different options that you could use to only assign an assignment to specific students:

• How do I assign an assignment to an individual student?
• How do I assign an assignment to a course section?
• How do I assign an assignment to a course group?

I hope these resources will be of help to you, Renee.  Please sing out if you have any questions about this information.