Harris served as a teaching elder at Gresham Household of Faith, which was an experiment in local church reform.
According to the Home School Legal Defense Association, his work helped launch the Christian homeschooling movement in the United States, Canada, Australia and Mexico.
Therefore, education and study, for good or ill, is nurtured best through what he calls the "power of companionship" among "fellow enthusiasts".
[4] According to his principle, many social ills are actually the negative consequences of delight-directed study among foolish, often age-segregated people, (e.g. drug abuse and gang membership), while many of the greatest human accomplishments are the consequence of delight-directed study among wise, age-integrated fellow enthusiasts (e.g. in science clubs, hobby groups and other affinity groups).
His twin sons, Alex and Brett Harris (born in 1989), are founders of The Rebelution, a Christian teen website and authors of the book Do Hard Things': A Teenage Rebellion Against Low Expectations.
Gregg and Sono's three younger children Sarah, Isaac, and James live in Gresham, Oregon.
[7] Seelhoff's business, which promoted home education and traditional family life, had suffered when her involvement with a man other than her husband became known.