Homeschool Academic Achievement, Grades K to 12
"a. Core is a combination of Reading, Language, and Math.
b. Composite is a combination of all subtests that the student took on the test.
Homeschoolers are still achieving well beyond their public school counterparts—no matter what their family background, socioeconomic level, or style of homeschooling.
In the study, homeschoolers scored 34–39 percentile points higher than the norm on standardized achievement tests. The homeschool national average ranged from the 84th percentile for Language, Math, and Social Studies to the 89th percentile for Reading. (See Figure 1.)"