I don&#x27;t know how conclusive the studies are but here is something to go with <a href="http:&#x2F;&#x2F;www.nea.org&#x2F;tools&#x2F;17360.htm" rel="nofollow">http:&#x2F;&#x2F;www.nea.org&#x2F;tools&#x2F;17360.htm</a><p>However I think it&#x27;s misleading to focus on their scores as a proof of good education, but that&#x27;s a whole other discussion.