Fig. 5.
Socioeconomic Gradients in Standardised Literacy Test Scores by Parental Education Level for 12 countries). Note, IALS = International Adult Literacy Survey. Source: Willms, 2003.
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.