A teacher wanted her students to learn vocabulary effectively. Which of the following ways should she adopt to teach vocabulary in her classroom ?

The correct answer is "Ask them to group the words into meaningful categories and use them in real life purposes."

Explanation:
Teaching vocabulary effectively involves engaging students in active learning and contextual understanding rather than passive rote memorization.

Key reasons why grouping words and using them in real-life contexts is effective:
1. Meaningful Categorization (Word Association): Grouping words into categories (semantic mapping or thematic grouping) helps learners organize vocabulary mentally, leading to better retention and conceptual understanding.
2. Real-Life Application (Contextual Use): Using words for real-life purposes ensures functional communication, allowing students to apply new terms in authentic speech and writing.
3. Active Learning: Unlike copying definitions or looking up isolated words in a dictionary, applying vocabulary in meaningful context promotes deeper cognitive processing and long-term memory integration.

Why other options are less effective:
- Simply writing words and meanings on a blackboard promotes rote learning without active involvement.
- Looking up isolated words in a dictionary or translating them directly lacks communicative context and real-world application.