A teacher wanted her students to learn vocabulary effectively. Which of the…

Vocabulary is retained and later used correctly when learners process a word's meaning deeply, by relating it to other words and applying it in a realistic context, rather than simply matching it to an equivalent in their first language or looking it up in isolation. This principle of active, contextualised, meaningful engagement is central to communicative and constructivist approaches to language teaching: organising new words into meaningful categories and requiring their real-life use produces far stronger and more transferable learning than translation or isolated look-up.

The option that asks learners to group new words into meaningful categories and use them in real-life situations puts this principle into practice: categorising builds semantic connections between words, and real-life use requires active production, both of which deepen processing and aid long-term retention.

The other approaches fall short of this because each stops at a shallower level of processing:

• Writing words on the board with teacher-given meanings supplies ready-made definitions, with no organising structure and no requirement for learners to use the words themselves.

• Underlining difficult words and translating them into the learners' own language again produces translation equivalents rather than functional understanding.

• Looking words up in a dictionary gives an isolated definition, with no organising structure and no requirement to use the word.

Because it combines meaningful organisation with authentic, real-life application, grouping new words into categories and using them in context is the pedagogically strongest choice among those offered.