Here are some highlights:
Household income had little impact on the results of homeschooled students.
- $34,999 or less—85th percentile
- $35,000–$49,999—86th percentile
- $50,000–$69,999—86th percentile
- $70,000 or more—89th percentile
The education level of the parents makes a bit of difference but those with no degree still have children who test well above the national average.
- Neither parent has a college degree—83rd percentile
- One parent has a college degree—86th percentile
- Both parents have a college degree—90th percentile
Whether either parent was a certified teacher did not matter.
- Certified (i.e., either parent ever certified)—87th percentile
- Not certified (i.e., neither parent ever certified)—88th percentile
Parental spending on home education made little difference.
- Spent $600 or more on the student—89th percentile
- Spent under $600 on the student—86th percentile
The extent of government regulation on homeschoolers did not affect the results.
- Low state regulation—87th percentile
- Medium state regulation—88th percentile
- High state regulation—87th percentile
HSLDA commissioned Dr. Brian Ray, an internationally recognized scholar and president of the non-profit National Home Education Research Institute (NHERI), to collect data for the 2007–08 academic year for a new study which would build upon 25 years of homeschool academic scholarship conducted by Ray himself, Rudner, and many others.
Drawing from 15 independent testing services, the Progress Report 2009: Homeschool Academic Achievement and Demographics included 11,739 homeschooled students from all 50 states who took three well-known tests—California Achievement Test, Iowa Tests of Basic Skills, and Stanford Achievement Test for the 2007–08 academic year. The Progress Report is the most comprehensive homeschool academic study ever completed.