Census-based NLSAs administered annually since 2006.
Oriented at system-level monitoring and school-level evaluation.
Sample-based NLSA administered intermittently from 1996 to 2013.
Census-based NLSAs administered annually since 2006.
Oriented at system-level monitoring and school-level evaluation.
Sample-based NLSA administered intermittently from 1996 to 2013.