Create a list the holds the student grade (A, A-, B+,..), modify the appropriate table to accept only the grades in the list(you need to explain why you selected the above table to record the student grade).
Create a form that will update the student grade Create a query using "List of values Match" using the "In" operator Create a query using "Not Logical operator" using the "Not In" operator
Create a form with 2 buttons to run the above 2 queries