A Set of Four at One Level
The four grids on a sheet share one level, which turns a page into a short series: the first grid teaches the patterns, the last one shows whether they stuck.
Writing in Smaller Cells
The cells are smaller than on the single-grid page, yet a digit and a light pencil note in a corner still fit.
Tips for the Dots
Start where black dots cluster: each one narrows two cells to a digit and its double: 1 with 2, 2 with 4, or 3 with 6. Then follow the white chains, where neighbors climb or fall by one.