Unfortunately again, however, this is untrue in that systems based on multiple measures are entirely limited by the indicator that, in educational measurement terms, performs the worst. (vamboozled.com)
It's good to see this knowledge becoming more available to replace the misconceptions of educational measurement. (teachermagazine.com.au)
You can learn more about it by spending a few minutes with any introductory educational measurement textbook. (ascd.org)