square root of negative one teach math: Factoring Woes

http://squarerootofnegativeoneteachmath.blogspot.com/2012/01/factoring-woes.html

I swear, as soon as the semester is over I'm writing blog posts that compliment my presentations last fall about polynomials and quadratics, including factoring. I've seen at least 5 blog posts this year from other teachers seeking better ways to teach factoring.