1Hiebert, J., Gallimore, R., Gamier, H., et al. Teaching Mathematics in Seven Countries: Results From the TIMSS 1999 Video Study [R]. U.S. Department of Education. Washington, DC: National Center for Education Statistics, 2003.
3Hiebert, J., Gallimore, R., Gamier, H., et al. Teaching Mathematics in Seven Countries: Results From the TIMSS 1999 Video Study [R]. U.S. Department of Education. Washington, DC: National Center for Education Statistics, 2003.