Massachusetts Curriculum Frameworks
MA.L.2. Grade 2 Language Standards [L]
Vocabulary Acquisition and Use
L.2.4. Determine or clarify the meaning of unknown and multiple-meaning words and phrases based on grade 2 reading and content, choosing flexibly from an array of strategies.
L.2.4.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).
L.2.4.c. Use a known root word as a clue to the meaning of an unknown word with the same root (e.g., addition, additional).