I didn't argue that it was necessary, but it is pretty basic. Sorry. Also, 'differentials' is a stretch. They teach students to interpret the gradient of a straight-line graph as a rate of change. It's the most cursory possible glance at calculus.
Yes you're right, it's basic at that level. But there is no need for most people to be doing advanced content like solving and integrating recursive functions, imaginary numbers and multidimensional number planes, playing with arctan etc all of which is in the A-level. Let those that want to do this content do it, and those that do not take another path. People will not properly learn what they do not want to be doing at this difficulty level and it is a considerable waste of time and resources.
I didn't argue that it was necessary, but it is pretty basic. Sorry. Also, 'differentials' is a stretch. They teach students to interpret the gradient of a straight-line graph as a rate of change. It's the most cursory possible glance at calculus.
Yes you're right, it's basic at that level. But there is no need for most people to be doing advanced content like solving and integrating recursive functions, imaginary numbers and multidimensional number planes, playing with arctan etc all of which is in the A-level. Let those that want to do this content do it, and those that do not take another path. People will not properly learn what they do not want to be doing at this difficulty level and it is a considerable waste of time and resources.