Until recently, much of the research on students' understanding of statistical ideas has focused on their conceptions of center or on what constitutes a good sample. In the past decade research on students' statistical thinking has broadened and increasing interest has been paid to how students think about variability in data or variability in…

Data collection and analysis are frequently neglected by school leaders over the course of the decision-making process. All schools gather large amounts of information about students and teachers, but most data are used to satisfy administrative requirements rather than evaluate school improvement in a systematic fashion. Apprehension regarding…

This document presents statistical information on children with special needs, their education, and the professionals who serve them. Graphs, tables, and charts are used to illustrate: (1) the number of children receiving special education services from 1989 to 1999; (2) the incidence of different disabilities; (3) the growth of students in the…