Quartile positions are determined separately for reading and mathematics. This will cause the number of schools in each quartile to vary. It simply evaluates the growth of all students regardless of whether they passed or failed a test. A school's quartile position can vary by subject. For instance, in the attached example, the target school is Q1 in reading with a TAG value of 5.38, and is Q2 in mathematics with a TAG value of 2.90.
Quartile position is relative to the performance of the other schools in the group.
A school may be Q1 for its own group and Q4 as a member of another school's group. Any school with fewer than 10 matched students for a subject will not have TAG values computed and will not be assigned a quartile position. The number of matched students for reading may differ from the number of matched students for mathematics . Changes from 1996 to Comparable Improvement Included in this year's CI report are two columns which did not appear on the 1996 report. These results are provided for information only and are not used in the calculation of Comparable Improvement.