NY Next Generation ELA 3L4.b
The Standard
Determine the meaning of the new word formed when a known affix is added to a known word (e.g., agreeable/disagreeable, comfortable/uncomfortable, care/careless, heat/preheat).
New York State Next Generation English Language Arts Learning Standards
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students determine how a familiar prefix or suffix changes a known word's meaning. They analyze the affix and base together to understand the newly formed word.
What Mastery Looks Like
- A student separates the affix and base, explains each useful meaning, and combines them accurately. The student checks the explanation in the word's sentence.
Common Misconceptions
- Students may define only the base word or give the affix one fixed meaning in every word. They may split the word incorrectly and treat letters inside the base as an affix.
How to Assess It
- Give students disagreeable, careless, and preheat in sentences. Ask them to mark each affix and base, then explain the complete meaning.
Lesson moves
Ways to Teach It
Build words with base, prefix, and suffix tiles, then write a definition equation for each result.
Ask, ‘How do comfortable and uncomfortable differ, and which word part creates that difference?’
Play Affix Detective by finding the real affix among plausible but incorrect word splits.
Identify affixed words in appliance directions and explain how each affix clarifies the required action.
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Printable 3L4.b Worksheet
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Related Standards
- 1L4.b
Use frequently occurring affixes as a clue to the meaning of a word.
- 2L4.c
Use a known root word as a clue to the meaning of an unknown word with the same root (e.g., addition, additional).
- KL4.b
Use the most frequently occurring inflections and affixes (e.g., -ed, -s, re-, un-, pre-, -ful, -less) as a clue to the meaning of a word.
- 2L4.b
Determine the meaning of the new word formed when a known prefix is added to a known word (e.g., happy/unhappy, tell/retell).
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