1 × 1 rib stitch
Alternating columns of knit and purl stitches make an elastic, reversible rib.
Counted practice swatch
Cast on an even number, such as 20 stitches. The repeat is 2 stitches.
Work the repeat
Every flat row: [k1, p1] 10 times. For an even count, the reverse face begins the same sequence. In the round, keep k1 above a knit column and p1 above a purl column.
Read the fabric
Stretch the sample sideways to find the recessed purl columns. If a column changes to bumps midway, check whether you knitted a purl stitch.