Washington DC Academic Standards
DC.CC.3.L. Language Standards
Vocabulary Acquisition and Use
3.L.4. Determine or clarify the meaning of unknown and multiple-meaning word and phrases based on grade 3 reading and content, choosing flexibly from a range of strategies.
3.L.4.c. Use a known root word as a clue to the meaning of an unknown word with the same root (e.g., company, companion).