Missouri Common Core Standards
MO.CC.L.2. Language Standards
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).
MO.CC.RF.2. Reading Standards: Foundational Skills
Phonics and Word Recognition
RF.2.3. Know and apply grade-level phonics and word analysis skills in decoding words.
RF.2.3(d) Decode words with common prefixes and suffixes.