What is the most effective strategy for building and extending students' vocabulary knowledge?

What is the most effective strategy for building and extending students' vocabulary knowledge?

• A. Showing students how to use roots and affixes to determine meanings
• B. Memorizing definitions from a dictionary
• C. Reading only short passages
• D. Using pictures to guess at meanings

Answer: (A)

Knowing how to break words into parts—roots, prefixes, and suffixes—lets students infer meaning and grow their vocabulary. When learners recognize common morphemes, they can decode unfamiliar words by analyzing their pieces. For example, bio- means life and -logy means study of, so biology is the study of life. Similarly, the prefix un- signals not, and the suffix -able means able to be, so unbelievable means not able to be believed. Because these morphemes recur across many words, this approach builds a reusable toolkit that expands vocabulary across all subjects and supports reading comprehension. Memorizing dictionary definitions alone doesn’t equip students to tackle new words they encounter in texts, and relying on pictures to guess meanings often fails for abstract or academic terms. Reading only short passages doesn’t provide enough exposure for learners to encounter and practice word parts in varied contexts.

Knowing how to break words into parts—roots, prefixes, and suffixes—lets students infer meaning and grow their vocabulary. When learners recognize common morphemes, they can decode unfamiliar words by analyzing their pieces. For example, bio- means life and -logy means study of, so biology is the study of life. Similarly, the prefix un- signals not, and the suffix -able means able to be, so unbelievable means not able to be believed. Because these morphemes recur across many words, this approach builds a reusable toolkit that expands vocabulary across all subjects and supports reading comprehension.

Memorizing dictionary definitions alone doesn’t equip students to tackle new words they encounter in texts, and relying on pictures to guess meanings often fails for abstract or academic terms. Reading only short passages doesn’t provide enough exposure for learners to encounter and practice word parts in varied contexts.