It's still on the curriculum in England [1], though the class is called something like "Food Technology". I don't know how well it is taught though — do most children still actually cook themselves for this lesson? It seems the curriculum requires that.
Back when I did it (fifteen years ago admittedly) we would cook once a week when doing food technology, which was part of the technology rotation where we'd study a particular subject for six weeks or so. In practice that probably meant twelve weeks or so a year. At about 15 you had to choose a single technology subject to study, so those who weren't taking it further wouldn't do any more.
I seem to remember it being quite focused on commercial cooking - lots of theory on portion calculations and pricing everything accordingly, but we would end up cooking something relatively simple and worthwhile. The commercial side apparently became much more pronounced for those who opted to continue, one friend of mine must have spent several months cooking endless variations on cannelloni trying to optimise it.
I remember something similar to that, we spent a chunk of time designing a box for the food to go in. But that doesn't seem to be on the curriculum any more, so that's progress.
(Studying boxes could be useful though, for example noticing the different ways companies emphasize nutritional information.)
[1] https://www.gov.uk/government/publications/national-curricul...