Where do you fly from and what navaids are 'in range' (VOR? DME? ILS? NDB?) when you're sitting on the ground going through your checklist?
And what Nav/comm equipment do you have: For example do you have two VOR/CDI/GS or one? One altimeter or two?
This might answer the question on how to check whatever Navaids you have available to you.
But , to be brutally frank, as others have said, you need a change of instructor.