“…These controversial views led to court challenges to states' VAM-based teacher evaluation systems (i.e., in Florida, Louisiana, Nevada, New Mexico, New York, Tennessee, and Texas; see Education Week, 2015). 3 Plaintiffs argued the following main points of criticism regarding VAM models within teacher evaluations systems including that VAMs can be: (1) unreliable, whereby current research suggests that teachers classified as "effective" one year will have a 25%-59% chance of being classified as "ineffective" the next year, or vice versa, with other permutations possible (Chiang, McCullough, Lipscomb, & Gill, 2016;Martinez, Schweig, & Goldschmidt, 2016;Schochet & Chiang, 2013;Shaw & Bovaird, 2011;Yeh, 2013); (2) invalid, whereby very limited research evidence supports the claim that VAMs can be used to draw accurate inferences about the extents to which different teachers cause changes (i.e., add value) in a collective groups of students' test performance over time (see, for example, Amrein-Beardsley, 2008;Braun, 2005Braun, , 2015Hill, Kapitula, & Umland, 2011); (3) biased, whereby current research suggests that, almost regardless of the sophistication of the statistical controls used to block bias, VAM-based estimates sometimes present biased results, especially when relatively homogeneous sets of students (i.e., ELLs, gifted and special education students, free-or-reduced lunch eligible students) are non-randomly concentrated in schools and teachers' classrooms (Baker et al 2010;Capitol Hill Briefing, 2011;Collins, 2014;Green, Baker, & Oluwole, 2012;Kappler Hewitt, 2015;Koedel, Mihaly, & Rockoff, 2015;McCaffrey, Lockwood, Koretz, Louis, & Hamilton, 2004;Newton, Darling-Hammond, Haertel, & Thomas, 2010;Rothstein & Mathis, 2013); (4) not transparent, with the main issue being that VAMbased estimates do not often make sense to those at the receiving ends of the estimates (e.g., teachers and principals) and, subsequently, these same groups are reportedly quite-to-very unlikely to use VAM-based output for formative purposes (see, for example, Eckert & Dabrowski, 2010;Gabriel & Lester, 2013;Goldring et al, 2015;Graue, Delaney, & Karch, 2013); and (5) unfair, with the fundamental issue being that states and districts can only produce VAM-based estimates for approximately 30-40% of all teachers, leaving the other 60-7...…”