“…Although most nations do not have such clear ideal types as Japan, analysis of the classroom video data in the 1999 Trends in International Mathematics and Science Study (TIMSS) suggests that these patterns may have more to do with the sequencing and timing of lesson events than with distinct ideal types (Givvin, Hiebert, Jacobs, Hollingsworth, & Gallimore, 2005, p. 342). Desimone, Smith, Baker, and Ueno (2005) found little variation in "gross teaching patterns" across 38 nations, based on a teacher survey, but did find that U.S. teachers used "conceptual instruction more with high-than with low-performing students" (pp. 523-524).…”