Observational report shows math stagnation trends in the USA over 23 years, indicating growth implications.
In this visual timeline -driven observational report and analysis based on the math grades 4 and 8 of the NAEP (the National Re port Card) of the USA 1992 -2015 (during 23 years), we demonstrate that the following 7 key points : 1) for the 50 USA states, the math stagnations are real, not something to wisp away as the stagnations kicked in around 2003 -2007 to the majority of the USA states for the math grade 4; 3) the math stagnations seemed to kick in a bit of time lag for the math grade 8 some years after the math stagnations kicking in for the math grade 4; 4) we observed this for the entire 50 states a gainst the national (public) average timelines; 5) the math stagnations even for the fastest math growing states out of the 50 states; 6) outside the 50 USA states, DC and DoDEA haven't had full-blown math stagnations yet, but their growths have slowed dow n significantly around 2013 - 2015; 7) all their timeline math growths plotted against the expect MMU
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Dongchan Lee (2026) studied this question.
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