CCSS.ELA-Literacy.L.2.4c
The Standard
Use a known root word as a clue to the meaning of an unknown word with the same root (e.g., addition, additional).
Common Core State Standards for English Language Arts
What This Standard Means
Students need to notice when two words share a base word and use the word they know to figure out the new word. They should be able to spot the familiar part, say what it means, then test that meaning in the sentence.
Mastery looks like a student saying, “I know help, so helpful means full of help,” and checking that it makes sense in context. Students often get stuck when spelling changes, like happy and happiness, or when they guess from the first few letters instead of finding the real base word.
Ways to Teach It
- Give pairs word cards like play, playful, replay, and player, then have them sort by base word and explain each meaning.
- Ask students to write: “I know the word ___, so I think ___ means ___ because ___.”
- Show five sentences with one underlined word each, and have students circle the base word and write a quick meaning.
- Bring in labels, school forms, or book covers, and have students find words built from known base words like care, color, or read.
Plan a Lesson for CCSS.ELA-Literacy.L.2.4c
Generate a complete lesson plan aligned to this standard, with objectives, activities, and materials. Free, no account needed.
Related Standards
- CCSS.ELA-Literacy.L.5.4b
Use common, grade-appropriate Greek and Latin affixes and roots as clues to the meaning of a word (e.g., photograph, photosynthesis).
- CCSS.ELA-Literacy.L.3.4c
Use a known root word as a clue to the meaning of an unknown word with the same root (e.g., company, companion).
- CCSS.ELA-Literacy.L.8.4b
Use common, grade-appropriate Greek or Latin affixes and roots as clues to the meaning of a word (e.g., precede, recede, secede).
- CCSS.ELA-Literacy.L.1.4b
Use frequently occurring affixes as a clue to the meaning of a word.