“…Across a variety of disciplines, teacher judgment of student ability has been found to be a reliable measure (Begeny, Eckert, Montarello, & Storie, ; Martínez, Stecher, & Borko, ; Perry & Meisels, ; Südkamp, Kaiser, & Möller, ); that is, teacher judgment was predictive and/or consistent with other measures of student ability. Mathematics is no exception in that teachers’ judgments have also been found to be reliable measures of students’ mathematical ability when compared to standardized or objective tests of ability (Egan & Archer, ; Hopkins, George, & Williams, ; Martínez et al, ).…”