I have a strong suspicion that teachers may use Cereal Boxes for Bookshelves when they run out of space. I can’t think what else they’re doing with these blasted things. Only very occasionally does anything come home resembling what was once a crispies box. The shoeboxes of course all reappear as miniature Roman villas, or the interior of a Victorian slum (which maybe started out as the Drawing Room in Downton Abbey before child sat on it). So, the only Cereal Box explanation could be that Miss is fed up with unsteady book-ends causing all the hundreds of ORT ‘readers’ to topple off the end of the shelves; she keeps them nice and compact in these.