One interesting facet of the study noted that academic achievement was equally high regardless of whether the student was enrolled in a full-service curriculum, or whether the parent had a state-issued teaching certificate.
The study states, "Even with a conservative analysis of the data, the achievement levels of the homeschool students in the study were exceptional. Within each grade level and each skill area, the median scores for homeschool students fell between the 70th and 80th percentile of students nationwide and between the 60th and 70th percentile of Catholic/Private school students. For younger students, this is a one year lead. By the time homeschool students are in 8th grade, they are four years ahead of their public/private school counterparts."
Homeschool students also did quite well in 1998 on the ACT college entrance examination. They had an average ACT composite score of 22.8 which is .38 standard deviations above the national ACT average of 21.0 (ACT,1998).This places the average homeschool student in the 65th percentile of all ACT test takers.