add more details to this:Percentiles are my preferred way to interpret standardized test scores. As Popham mentions, they are easy for me to understand and provide quick information about where that student ranks in terms of a large population of fellow test-takers. A student at the 50th percentile will be smack in the middle of the bell curve. This does not tell me everything I need to know about that student as an individual learner, but it gives me some information