Math stagnations of the USA
For more than 15 years, according to the biannual NAEP tests, the vast majority of the USA states have been stuck in the math stagnations.
Math stagnations for 15-20 years in the USA (till 2015)
Math stagnations for 15-20 years in the USA (till 2019) based on the NAEP tests: all the USA states vs. Puerto Rico math average
Note that the NAEP math of Puerto Rico is roughly 1.5-2 Standard Deviations below the USA continental average.
More detailed percetile distributions of the NAEP math between the USA national public average vs. that of Puerto Rico
The original MMU1 operations (2017) to boost the math worst half to the math best half average quickly with its massive positive economic impacts.
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