- Draws and counts rows as rows, drawing with parallel lines. Counts the number of squares by iterating the number in each row, either using physical objects or an estimate for the number of times to iterate.
- Those who count by ones usually do so with a systematic spatial strategy (e.g., by row).
- If the task is to measure an unmarked rectangular region, measures one dimension to determine the size of the iterated squares and eventually measures both, to determine the number of rows needed in drawing.
- May not need to complete the drawing to determine the area by counting (most younger children) or computation (repeated addition or multiplication).