rremark on plotting from a paedagogical point of view

[Angus]

Obviously there is different teaching content, too. My personal opinion is that it is worth being discussed if students need (or to be more precise: should use) a calculator like the prime at all if they fail at reading simple graphs...
But it is a totally different topic. I think everyone is aware that the students ThomasA has in mind are like 6th graders or so and not at a university level ;-)