Four Puzzles on One Sheet
Every grid on the page is different, drawn from its own random solution, but all of them follow one level. A teacher can hand one sheet to a pair of pupils and let each solve two grids, or cut the page into four cards.
Small Cells, Same Logic
Cells shrink on these four-grid sheets, yet a digit still fits easily under a pencil. The dots sit on the lines between cells, exactly as on the large grids.
Building Confidence
Solving several tiny grids in a row trains the eye to spot what each dot allows on a four-digit grid. By the fourth grid of a sheet, most solvers read the black dots without counting.