- Iowa Recertification Letter 2010
- Iowa Recertification Letter 2011
- Iowa Recertification Letter 2012
- Iowa Recertification Letter 2013
- Iowa Recertification Letter 2014
- Iowa Recertification Letter 2015
- Iowa Recertification Letter 2016
- Iowa Recertification Letter 2017
- Iowa Recertification Letter 2018
- Iowa Recertification Letter 2019