[Header Photo by USGS on Unsplash]
Update [December 2025]

Here I want to note that Q1 and Q3 have been answered, and the answer is exactly what I have been suggesting.
First, let me recommend How much of “Mississippi’s education miracle” is an artifact of selection bias?, which examines the analysis answering two of the questions below: On education miracles in general (and those in Mississippi in particular), Howard Wainer, Irina Grabovsky and Daniel H. Robinson.
Here are the highlights, although I recommend reading the entire piece:
In 1748, famed Scot David Hume defined nature. He elaborated such a law as “a regularity of past experience projected by the mind to future cases”. He argued that the evidence for a miracle is rarely sufficient to suspend rational belief because a closer look has always revealed that what was reported as a miracle was more likely false, resulting from misperception, mistransmission, or deception….
A careful examination confirms that enthusiasm to emulate Mississippi should be tempered with scepticism….
This provides a boost of about $111.63 of extra funding annually for each pupil. Comparing this amount to what are annual contemporary per pupil expenditures nationally, we have to agree that if such small expenditures can make a visible difference in student performance it truly is a miracle – a Mississippi version of St. John’s loaves and fishes.
But it was the second component of the Mississippi Miracle, a new retention policy, perhaps inspired by New Orleans’ Katrina disaster a decade earlier, that is likely to be the key to their success….
Prior to 2013, a higher percentage of third-graders moved on to the fourth grade and took the NAEP fourth-grade reading test. After 2013, only those students who did well enough in reading moved on to the fourth grade and took the test.
It is a fact of arithmetic that the mean score of any data set always increases if you delete some of the lowest scores (what is technically called “left truncation of the score distribution”)….
Strangely though, for the eighth-grade literacy test, the state’s rank dropped to a tie for 42nd place!…
(Note that this works especially well for student height, for after retaining the shortest third-graders for an extra year they will likely be taller when they are measured again a year later. It would be nice if the same were true for students struggling in academic subjects.)…
Were we to do this we would find that most of Mississippi’s gains are due to the retention rate.
It is disappointing, but not surprising, that the lion’s share of the effects of the “Mississippi miracle” are yet another case of gaming the system. There is no miracle to behold. There is nothing special in Mississippi’s literacy reform model that should be replicated globally. It just emphasises the obvious advice that, if you want your students to get high scores, don’t allow those students who are likely to get low scores to take the test. This message is not a secret….
Find a way to prevent the lowest test scorers from taking the exam and the average score will increase….
Second, besides weak empirical data, educational reformers like Patrinos should have given greater weight to the extant literature on the Mississippi Miracle. The miracle had already been convincingly debunked.10 Fourth-grade gains had vanished by the time the students reached eighth grade.
Question 1: Why is Mississippi retaining about 9000-12,000 K-3 students annually since 2014?
One of the key assertions of the “science of reading” (SOR) movement is that students across the US are mostly not proficient readers because teachers rely on balanced literacy to teach reading.
And then, SOR advocates argue that 95% of students can be proficient readers, and the key to that success is SOR.
That raises an important question about Mississippi, which has implemented both SOR reading policy and grade retention for over a decade.
SOR advocates have called MS’s jump in grade 4 NAEP scores a “miracle”; however, MS has continued to retain about 9000-12,000 students annually in K-3.
Certainly, a decade is enough time to reach the 95% rate of proficiency, and thus, retention numbers should have dropped dramatically or be near 0.
Question 2: How is Mississippi a “miracle” if the achievement gap for race and socioeconomic status is the same as 1998?
As shown in MS’s 2024 NAEP reading scores for grade 4:

Question 3: Why has Mississippi’s grade 8 NAEP scores remained in the bottom 25% of states despite the grade 4 NAEP scores jumping into the top 25%?
For 2024, MS NAEP grade 8 reading scores drop to eleventh from the bottom of state scores:


An analysis of reading reform found that states with comprehensive reform that includes grade retention have experienced short-term increases in test scores.
However, the analysis does not identify why these comprehensive reforms (including grade retention) are correlated with those short-term scores increases.
Research on education “miracles” have found that virtually none exist, and even when a school or program appears to be “high flying” there is little evidence those can be scaled up meaningfully.
Mississippi’s grade 4 NAEP scores in reading, then, raise questions that must be answered; instead, it is now politically cool to adopt copy-cat legislation from the state without proper evidence that there is valid success or a solid understanding of what is happening and why.













