The achievement gap is largely set by age 5: IQ/test scores in standard deviations, by parent income quartile
|Age||Parent income in lowest quartile||Parent income in lowest quartile||Parent income in highest quartile||Parent income in highest quartile|
Note: IQ scores are available through age 8 and are represented by a solid line. After age 8, math test scores are shown. A 3-year moving average is used for math scores, represented by a dotted line.
Source: Adapted from Council of Economic Advisers (2014)