2. It should be obvious that differentiation is a calculus concept not a PRE-calculus concept. There should be no confusion at all on that issue (although I admit that it does assume people know that the prefix 'PRE' means 'before'. A reasonable assumption, I would think.)
Just to put in my two cents, the precalculus class in my high school taught Riemann sums and the difference quotient--people won't know that's calculus and being in a precalc class are naturally going to post it here.
Equally, what is the situation regarding University Pre-calculus? Presumably there is some course at some university somewhere where the students study "Pre-Calculus" topics such as co-ordinate geometry, natural logs, etc.?
The forums should probably be arranged by topic rather than by place of study at all, but I find it unlikely that the entire website is going to be changed.
So perhaps we should just quit whinging and follow the mods' intructions?
Having finished my Maths' studies at school today I hope to never need to be here again anyway!
I think it's confusing too, "After trig but before calc"... even as an American.
In my school, after one completes AlgebraI, AlgebraII, and Geometry, he will go into the more advanced maths, obviously.
If he chooses to take the "calculus root", he will spend a fall semester learning "Advanced Algebra and Analytic Geometry" (usu. abbreviated to AGAAA) and one semester of "Trigonometry". As soon as he gets back to school in the fall, he will take Calculus. There's nothing in between.