The bureau computes what nobody has counted — and publishes every study on the site where the data lives, with the full methodology and the dataset attached. If you write about it, take the numbers. They're CC-BY: reuse with a link.
All 348 combinations of the 1933 Dictionary of Color Combinations, computed: hue distribution, most-used colors, mood frequency. — on colorcombinations.org
The same 348 plates joined with the WCAG 2.x standard: AA/AAA pass rates, the most and least legible plates of 1933. — on colorcombinations.org
13,258 state-listed school book assignments joined with published page counts: median length by grade, the 3rd-grade cliff, full coverage caveats. — on readinglist.school
13,258 source-verified state reading-list entries: the most-assigned books and authors, the era split, grade-band winners and state exclusives. — on readinglist.school
The assigned canon, by publication year: median 2012, a third from the last decade, about 1 in 12 before 1980 — the “dusty classics” image, tested against 13,250 source-cited assignments. — on readinglist.school
1,597 books assigned at least 3 times across 13,258 source-cited assignments: the median gap between the lowest and highest grade a book is taught in is 4, and 83% have a gap of 3 or more — while published grade bands agree with observed placement on average. — on readinglist.school
The reference layer: every book and reading number the bureau can source, as dated lookup tables with a CSV attached to each one.
Most-assigned books, ranked · Assigned books statistics · School reading list statistics · Book length statistics · Assigned book age statistics · Reading statistics: how many Americans read · Bestseller statistics: the odds of making the list