Funny, Funny.
I took two degrees at Texas University in the 1950s, including several math courses, and never, at any time, heard anyone mention pi= 3 being taught at any level.

Here is a joke from "Texas Mathematics Teacher," Fall 2004, put out by the Texas Council of Teachers of Mathematics, est. 1953.

"Do you know pi r squared, Grandpa?"
"Nonsense! Pie are round and cornbread are square."

The issue contains the article "Slices of Pi: Rounding Up Ideas for Celebrating Pi Day," pp. 6-7.
http://www.tenet.edu/tctm/downloads/TMT_Fall_04.pdf
Math teacher