Many of them avoid the equal sign, hoping to promote a looser relationship of “equivalence” instead. It's been controversial.

Taken very literally, not all students are created equal -- especially in their math learning skills, say researchers who have found that not fully understanding the "equal sign" in a math problem ...

COLLEGE STATION, Aug. 10, 2010 — Taken very literally, not all students are created equal — especially in their math learning skills, say Texas A&M University researchers who have found that ...