“…To ensure that the list of items we developed corresponded to the construct of student engagement, we identified eight experts on student engagement and math and science instruction to judge how well the items represented the construct. Each expert was asked to rate each of the items on clarity (how understandable each item was) and relevance (how well each item represented the construct) (see McGartland Rubio, Berg-Weger, Tebb, Lee, & Rauch, 2003, McKenzie, Wood, Kotecki, Clark, & Brey, 1999, for description of the expert validation process). In addition, experts were asked to provide suggestions on alternative wording and on any aspects of the construct that they felt were not adequately represented by the set of items.…”