Research conducted at The Leadership and Learning Center on the “90/90/90 Schools” has been particularly instructive in the evaluation of the use of standards and assessment. The 90/90/90 research includes four years of test data (1995 through 1998) with students in a variety of school settings, from elementary through high school.  Our analysis considered data from more than 130,000 students in 228 buildings.  The school locations included inner-city urban schools, suburban schools, and rural schools.  The student populations ranged from schools whose populations were overwhelmingly poor and/or minority to schools that were largely Anglo and/or economically advantaged.