And the struggles aren't limited to low-income kids, the study's author said. "For math, income inequality was associated with lower achievement for both poor and non-poor students alike," said ...

GENDI WANG, XIAOHUI ZHANG, YUMING CHU, A POWER MEAN INEQUALITY INVOLVING THE COMPLETE ELLIPTIC INTEGRALS, The Rocky Mountain Journal of Mathematics, Vol. 44, No. 5 (2014), pp. 1661-1667 ...