As much as it seems counter-intuitive, teaching new vocabulary in
semantic sets (e.g. jobs: doctor, teacher, lawyer etc. or colours: red, blue, yellow etc.) does not facilitate learning. As far back as in the 1990s,
research showed that teaching semantically related items is counter-productive. Have these findings been taken
on board? Of course not! New vocabulary in elementary level coursebooks is
routinely presented in lists of semantically related items.