“…In the first variation, which we call the Basic condition, teachers implement structured vocabulary lessons (about one lesson per week) targeting 24 academically relevant words during a 21-week period of implementing a broader language-based instruction, Let's Know!. The vocabulary lessons were designed to embody those characteristics of instruction seen in many effective, robust vocabulary interventions (Beck & McKeown, 2007;Biemiller & Boote, 2006;Coyne, McCoach, & Kapp, 2007;Coyne et al, 2010;Pollard-Durodola et al, 2011): (a) explicit discussion and defining of targeted words, (b) exposure to these words in varied contexts, including read-alouds, and (c) ongoing opportunities to elaborate the meaning of words and connections with other words via various work with words (e.g., use of graphic organizers). In the second condition, which we call the Double-Dose condition, each vocabulary lesson in the Basic condition was followed by a supplemental vocabulary support lesson featuring additional activities to deepen children's knowledge of targeted words, similar to the extended-instruction approach described by Coyne and colleagues (2010).…”