South Dakota ELA 3.RF.3.b

ELA3rd GradeReading Foundational Skills

The Standard

3.RF.3: Know and apply grade-level phonics and word analysis skills in decoding and encoding words.

Identify and understand the meanings of common prefixes and derivational suffixes.

South Dakota English Language Arts Standards (2025)

Teacher's field guide

What Students Need to Do: Students find the base word in words like replay and careless. They explain how a prefix or suffix changes its meaning and use the whole word in a sentence.
What Mastery Looks Like: A student explains that replay means play again and careless means without care. They check that meaning against the sentence around the word.
Common Misconceptions: Students may treat the re in red as a prefix, even though d is not a base word. They may think careless means caring because they miss -less.
How to Assess It: On an exit ticket, ask: What do replay and careless mean? Circle each base word and explain what re- and -less add.

Lesson moves

Give pairs cards labeled re-, un-, play, tie, help, -ful, and -less; have them build words and explain each meaning.
Ask, 'How do helpful and helpless describe different people?' Have students write one sentence using each word.
Play a matching game with cards for replay, untie, helpful, and careless and cards showing their meanings.
Show a recipe card that says 'preheat oven'; ask students what pre- tells a cook to do and when.

Free download

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

PDF, US Letter, prints cleanly in black and white.

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