South Dakota ELA 4.RF.3.a

ELA4th GradeReading Foundational Skills

The Standard

4.RF.3: Demonstrate proficiency in grade-level phonics and word analysis skills in decoding and encoding words.

Identify and use common prefixes, suffixes, and root words to decode and encode words.

South Dakota English Language Arts Standards (2025)

Teacher's field guide

What Students Need to Do: Students spot prefixes, suffixes, and roots in words. They use those parts to read unfamiliar words, spell them, and work out what they mean.
What Mastery Looks Like: A student can split unhelpful into un-, help, and -ful, then read and spell it. They can use port, meaning carry, to read portable and explain why it describes something you can carry.
Common Misconceptions: Students may write un helpful as two words or spell replayed as replaied. Some expect -ed to sound the same in every word. Others miss that port has the same meaning in portable and transport.
How to Assess It: Dictate unhelpful and portable. Have students write both, mark the word parts, read them to a partner, and explain what port means in portable.

Lesson moves

Give pairs re-, un-, play, help, -ed, and -ful cards; have them build, read, and copy replayed and unhelpful.
Ask students to write why portable means able to be carried, using port and -able in their answer.
Call out played again and not helpful; pairs race to spell replayed and unhelpful, then underline the prefix and suffix.
Show a reusable water bottle label; students mark re-, use, and -able in reusable, then explain what the label tells buyers.

Free download

A ready-to-print activity worksheet aligned to 4.RF.3.a, with an answer key for the teacher on its own page. No account needed.

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