Science Benchmarking Report: TIMSS 1999-Eighth Grade

Achievement for U.S. states and districts in an international context
Martin, Michael O. Mullis, Ina V.S. Gonzalez, Eugenio J. O'Connor, Kathleen M. Chrostowski, Steven J. Gregory,Kelvin D. Smith, Teresa A. Garden, Robert A.
Boston College , Chestnut Hill, MA (2001)