Harold R. Jacobs
Harold R. Jacobs (born 1939), who authored three mathematics books, both taught the subject and taught those who teach it. Since retiring he has continued writing articles, and as of 2012 had lectured "at more than 200" math conferences.

His books have been used by some homeschoolers and has inspired followup works.
Q83602
homeschoolers
Concept
Q87056386
Harold R. Jacobs
PER
1939-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1939
DATE
2012-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2012
DATE
date of birth