It is dangerous to exaggerate ineffectiveness by assuming teachers within the bottom quartile or bottom quintile of performance are ineffective. (educationnext.org)
Yet the link between teacher pay and attrition rates isn't iron - clad; Missouri and North Carolina, for example, have bottom quintile starting salary and wage competitiveness, yet better - than - average attrition rates (5.9 and 5.5 percent, respectively). (ascd.org)
As MFO readers would expect, comparison of top and bottom quintiles reveals the following tendencies: (mutualfundobserver.com)