If they were, they would have given better answers as they got larger, faster, and used smaller grid sizes... but they continue to give the same answers. (judithcurry.com)
Next, the teachers were handed progressively smaller grids of squares and asked to refine their estimate with each new grid. (edsource.org)
It consists of small grids, resembling old marble tiles of gray and ivory, with hints of beige and light brown. (artasiapacific.com)