Playing Scattergories tonight, an opponent tried to get two points for "equality equations", which I promptly shot down for being mathematically and linguistically redundant. Apparently some teachers actually use that term to contrast with "inequality equations", which I was taught in no uncertain terms is a contradiction in terms: if it has an equals sign, it is an equation; if it has >, <, or some variant thereof, it is an inequality.
I was accused of being a cocky douche when I claimed to have had some of the best math teachers in the world. I admit that might be an exaggeration (the beer was talking?), but it is not hyperbole if I limit the scope to the United States--my high school was, and may still be, the only one in the country to have two
Presidential Award for Excellence in Mathematics and Science Teaching winners.
So kiss my ass, y'all.