“…The curriculum under investigation, Let's Know!, uses a systematic scope and sequence of instruction organized over four thematic units to bring about change in children's language skills, encompassing vocabulary, grammar, comprehension monitoring, inferencing and reasoning, and text structure. To date, we are aware of few curricula or programs that are designed to improve children's skills across these multiple dimensions of oral language (but see Clarke et al, 2010;Williams, 2005;Williams et al, 2004;Williams et al, 2005). Given evidence showing that early primary-grade teachers provide relatively a limited quantity of language-focused comprehension instruction (Connor et al, 2006;Justice et al, 2008;Walpole, Chow, & Justice, 2004), even in the context of adopting language-focused curricula (Connor et al, 2006;Justice et al, 2008;Pence et al, 2008;Pianta, Mashburn, et al, 2008;Walpole et al, 2004), the present study examined whether pre-K -grade 3 teachers' use of the Let's Know!…”