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CSAP Tests: The achievement data below will look a little different from how it has been presented in the past. Boulder Valley has adopted the Colorado Department of Education’s weighted index for analyzing CSAP data instead of percent proficient and above as we have historically.
The main limitation of using percent proficient and above is that it is not sensitive to all changes in performance. For the highest achieving students, progressing from proficient to advanced is of value. For lower achieving students, progressing from unsatisfactory to partially proficient is a meaningful step on the way to reaching proficiency. Yet neither of these improvements is recognized when we focus exclusively on proficient and above.
One of the biggest advantages of the weighted index is that it recognizes gains or losses across all performance levels, not just from partially proficient and below to proficient and above or vice versa. Also, the weighted index allows for averaging across grade levels and comparison across years in school.
To calculate the weighted index, each performance level is given an assigned value and then the values are averaged. An advanced proficient score is worth 150, proficient is 100, partially proficient is 50 and unsatisfactory and not tested receive -50. If all students were to achieve a score of proficient, a school’s weighted index score would be 100. The weighted index calculation works in much the same way as a grade point average (GPA). Point values are given for each grade (or level of proficiency) and the average falls between the values associated with those categories.
Please note, weighted index calculations must be viewed in light of standard error. Standard error gives a rough idea of how much we might expect the average score for all students to vary due to chance, based on the number of students who were assessed.
You can find CSAP data analyzed in terms of percent proficient and above on the BVSD website at: http://reportcard.cde.state.co.us/reportcard/pdf/2008_0480_1390_M.pdfThe Colorado Department of Education school accountability reports also present the data in this way.
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2205 Norwood Avenue
Boulder, CO, 80304
Phone: 303.443.3760
Fax: 303.443.3761
Email: bvsd.cem@bvsd.org
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