Figure 2.
Estimation patterns for both versions of the number line estimation task. The left column depicts bounded and the right column depicts unbounded number line estimates for all age groups (grade one through adults: A–E).
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.