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.
Examples for the number sense tasks position marking (a1,a2), number naming (b1,b2) and line bisection (c1,c2). a1 and b1 show a number line arranged in a ’familiar’ left to right fashion; a2 and b2 show a line in an ’unfamiliar’ right to left way. c1 displays quantities using numeric symbols whereas c2 uses non-symbolic dot-arrays.
