2005 – How Does Middle Grades Teacher Certification Affect Teacher Practices and Student Learning? Posted on 20052017 by danzap@illinois.edu How Does Middle Grades Teacher Certification Affect Teacher Practices and Student Learning? Mertens, SB, Flowers N, Mulhall PF, Middle School Journal, Vol. 36, No. 5, p. 56-61 [Accessible online here.]