place a box of organic oranges on my desk and ask each student to come and choose one to take back to their desk. then i asked them to look at and describe it in writing. when done, i’d have them return their orange to the box. then i’d mix the oranges in the box and ask them to come up and select their orange. they would typically look at me dumbfounded.
i’d then offer “let’s do this again.” low and behold they were able to see unique things in their oranges they had overlooked before enough to later be able to distinguish their orange from others (part of why i 