In June 2014 NZQA released a press statement saying that nearly 25% of the 2013 internal assessments were incorrectly marked. Students were nevertheless able to use the wrongly awarded credits to gain NCEA. Each year NZQA takes a random sample of internal assessment for close checking. In some schools nearly all the credits gained are from internal assessments. Additionally, lower decile schools tend to both use internal assessment more and have larger gaps between internal and external achievement rates when compared to higher decile schools. NZQA said there were more mistakes than usual as new standards had been introduced during the ongoing realignment and teachers had not yet adjusted their marking.