Number Line Estimation

Mark where a number sits on a 0–100 (or 0–1000) line. Percent absolute error (PAE) is computed.

Age 6+≈ 3 minutes16 items

Run it in a quiet place on a computer or tablet, with an adult present. On timed subtests, tell the child to be "quick but careful".

Results are stored only on this device; nothing is sent to a server.