Also I noted the 50 star flag ???
50 star flag???
Count again. 6 rows of 8 stars is 48.
While I didn't count the stars, if I'm not mistaken, the flag at the back of the classroom is hung backwards (about 1:20 into the video). The flag has the stars positioned at its top right. I believe that they should be at the top left when the flag is hung vertically.