There were multiple classrooms / teachers in each condition, making it possible to separate the effects of curriculum from the effect of particular teachers and classrooms. (educationnext.org)
Understanding teacher cognition — and in particular teacher noticing poses significant challenges to researchers because of the ongoing nature of teaching. (semanticscholar.org)
Parents, if they see the scores, may use them to request particular teachers for their children. (carnegieknowledgenetwork.org)