Horizontal Alternatives to Vertical Lists

IATEFL YLTSIG monthly webinar with Leo Saliva on Horizontal Alternatives to Vertical Lists Vocabulary in elementary school textbooks tends to be organised in semantic sets, e.g. clothes (shirt, skirt, trousers), colours (red, blue, yellow) or animals (lion, elephant, wolf). Is it the most effective way of presenting new words? Leo Selivan looks the research into L2 vocabulary learning and proposes some alternatives which can be easily implemented in class.