Hi, let me sum up. You’ve got a list of
-‘Pupil’, probably with First, Last name, Age…
-‘Test’ with Name, and Score. Each one is linked to a ‘Pupil’.

Then your repeating group will be: Do a search for ‘Tests’ with the constraint ‘Pupil’=DropDown ‘Pupil’.
Check the checkbox “ignore empty constraints” if you want to show all the tests when your Pupil dropdown is empty.