Scale scores, 1998 (left) and 2010 (right) Share on Facebook Tweet this chart EmbedCopy the code below to embed this chart on your website. Download image Previous chart: « Reading and math achievement gaps, and principal noncognitive skills gaps between high-SES and low-SES children at the beginning of kindergarten in 2010–2011, under unadjusted and clustered models Next chart: Distribution of standardized scale and theta scores in reading, by year »