Nationally Normed Elementary Achievement Testing in America's Public Schools: How All 50 States Are Above the National Average

reported results from all 50 US states plus large numbers of districts

US public elementary schools using commercially published, nationally normed achievement batteries

A survey-and-critique by a physician outside the measurement field, published in the measurement field's own journal with an editorial framing that treats it as a challenge rather than as a finished analysis. Methodologically it is a compilation of reported results, not a designed study - grade D. Its importance is entirely in the arithmetic contradiction it surfaced, which professionals then took up and quantified (see Linn, Graue & Sanders 1990 and Shepard 1990).

All fifty states reported above-average performance on nationally normed achievement tests. This is arithmetically impossible against a live national norm, so something about the reported percentiles was wrong. The editorial note accompanying the article concedes the substance - "increased achievement is by no means the whole explanation for this finding" - and the subsequent literature attributed it to stale norms, teaching to the specific form, and non-representative local administration. The relevance to this archive is direct rather than historical: a homeschooling family who tests with a commercially normed battery is reading a percentile against exactly this kind of norm sample, and the "Lake Wobegon effect" is the reason a flattering percentile from a publisher-normed test is worth less than it appears.

Not applicable - a critique of reported norm-referenced statistics.

Independently confirmed and quantified by Linn, Graue & Sanders (1990) and analysed by Shepard (1990); this is one of the few grade-D sources in the archive whose central claim was subsequently reproduced by better work.