Did you take standard high-school Algebra 1 in 7th grade? Algebraic concepts are often taught as early as 3rd grade, but much of it is considered pre-Algebra.
I didn't take Algebra in highschool, so.. maybe? 5th and 6th grade were called Pre-Algebra. 7th and 8th were Algebra. 9th was Geometry, 10th was Trig, and 11th and 12th were Calc.
