This paper provides practical guidance for researchers who are designing and analyzing studies that randomize schools--which comprise three levels of clustering (students in classrooms in schools)--to measure intervention effects on student academic outcomes when information on the middle level (classrooms) is missing. This situation arises…

This study examines the work of US school principals from the perspective of their workday using a distributed perspective to frame the investigation. Using data on 38 school principals in one mid-sized urban school district in the US, it describes school principals' work practices, examining both the "focus" of that work and…

Student performance in basic math and reading skills in the United States trails behind other developed countries, providing the rationale for more research to determine how performance might be improved. Following evidence to conclude that multilingualism enhances cognitive, neuro-linguistic and meta-linguistic development, it is proposed that…