The Core Composite, previously called the "Core Total," can also be quite helpful. Homeschoolers usually study history and geography more than is in the typical public school “social studies” course - which includes almost exclusively politically correct thought, urban and rural considerations, ecology, minority issues, and political/government issues. As a result, the social studies score does not always reflect the education and worldview of the typical homeschooled student. Likewise, science doesn’t always reflect the homeschooler’s course of study - which often centers on actual observational and experimental science rather than on evolutionary origins. That being the case, the Core Composite might be useful. It is a weighted score based only on the “three R” subjects of reading, language and math, excluding the social studies and science scores.
But for county reporting, parents will still look at the NPR scores for the five required subjects.
The graphic below illustrates how the percentile ranks compare with the stanine score. Percentile ranks are the result of a distribution of scores on a bell curve and only refer to how the student did compared with all students (or the students in the norm group). The bell curve is divided into 9 stanine ranks, each containing a range of percentile ranks. The 4th stanine begins at the 23rd percentile rank, which is the beginning of average. Therefore, the law’s new standard (within or above the 4th stanine) includes all scores in the average range.