Suffixes Change Words

Overview

Lesson 2 of 4 in the unit “Word Parts: Prefixes and Suffixes”. Students explore how common suffixes change meaning, tense, number, or word class, building vocabulary, spelling, decoding, and sentence-writing skills that support later NCEA English learning.

Learning intentions

• WALT identify a base word and suffix.
• WALT explain how common suffixes change a word’s meaning or grammatical job.
• WALT notice spelling and pronunciation changes when adding suffixes.
• WALT use suffixed words accurately in sentences.

Success criteria

• I can underline the base word and circle the suffix.
• I can explain the job of -s, -ed, -ing, -er, -ful, -less, -ly, and -ness.
• I can identify when a suffix changes a word class.
• I can spell and use at least four suffixed words accurately.

Curriculum links

• Vocabulary and morphology: using word parts to decode, spell, and build meaning.
• Grammar knowledge: recognising nouns, verbs, adjectives, and adverbs in context.
• Sentence construction: selecting precise words for purposeful communication.
• Oral language and later NCEA preparation: explaining language choices and supporting interpretations with clear evidence.

Lesson structure (50 minutes)

1. 0–5 minutes – Retrieval warm-up

Open with the retrieval warm-up. Display yesterday’s prefix cards or examples and ask students to orally build two words, such as un + kind and re + play. Prompt: “What is the base word? What does the prefix add?” Briefly revisit that a base word carries the main meaning and a prefix comes before it.

2. 5–15 minutes – Teacher modelling

Use the suffix modelling examples and model the base word in black and suffix in red. Work through help/helpful, hope/hopeless, quick/quickly, kind/kindness, teach/teacher, and jump/jumped/jumping. Explain that some suffixes change meaning, while grammatical endings may show tense or number.

Think aloud: say the base word, add the suffix, check pronunciation, then check spelling. Compare hope/hoping and run/runner as examples of spelling changes to notice rather than rules to memorise in isolation. Ask students to repeat each word and tap its syllables.

3. 15–30 minutes – Guided sorting and matching

In groups of three or four, distribute suffix cards, base-word cards, and word-class cards. Students first sort completed words into noun, verb, adjective, and adverb. They then match suitable base words and suffixes, reading each new word aloud.

Display the sentence frame from the guided practice instructions: “The suffix ___ changes ___ into ___, meaning ___.” Complete two examples together, then invite groups to explain one match. Read short, low-density sentences about gaming, sport, friendship, and school. Students identify the suffixed word and discuss why that suffix fits the sentence.

4. 30–42 minutes – Independent practice

Distribute the suffix practice worksheet. Year 9 students complete a suffix sort and write four sentences using four target words. Encourage one word at a time: say it, split it into base and suffix, check its meaning, then write it.

Year 10 students complete the core task, then transform selected base words across word classes where possible. They explain why a suffix fits a sentence and edit a short paragraph for suffix and spelling accuracy. Circulate, asking: “What is the base word?” and “Has the suffix changed meaning, grammar, or both?”

5. 42–47 minutes – Mini-whiteboard assessment

Open the mini-whiteboard check. Students add a suitable suffix to four bases, such as quick, hope, jump, and kind. They hold up answers, label the resulting word class, and explain one meaning change. Address common errors immediately, especially confusing -ful and -less or treating every suffix as a tense ending.

6. 47–50 minutes – Review and next-step reflection

Return to the learning intention on the plenary slide. Students tell a partner one suffix they can explain and one word they can now spell using a word-part strategy. Collect the worksheet or photograph selected responses for planning the next lesson.

Resources

• the suffixes introduction and teaching deck
• the suffix practice worksheet
• Suffix cards and base-word cards
• Word-class cards labelled noun, verb, adjective, and adverb
• Sentence strips about gaming, sport, friendship, and school
• Morpheme mats
• Coloured pencils or highlighters
• Mini-whiteboards and pens
• Large-print copies
• Magnetic letters, sand trays, oral recording, and text-to-speech options

Assessment

• Listen during sorting and sentence-frame explanations for accurate identification of base words, suffixes, and word classes.
• Check the independent worksheet for accurate word formation, spelling, sentence use, and explanation of suffix function.
• Use the mini-whiteboard responses to identify students needing further support with grammatical endings, meaning-changing suffixes, or spelling changes.

Differentiation

• Use colour-coded morphemes, repeated oral rehearsal, syllable tapping, magnetic letters, tracing or writing letters in sand, and paired reading. Recycle the same examples across activities.
• Provide a word bank, icons, large print, sentence frames, and adult scribing, speech-to-text, oral recording, or text-to-speech. Avoid dense copying; read instructions aloud and offer a quiet working space where possible.
• For students needing clarity, explicitly separate grammatical endings such as -s, -ed, and -ing from meaning-changing suffixes such as -ful, -less, -ly, and -ness.
• Keep Year 9 work to high-frequency examples and one suffix at a time. For Year 10, extend word-class analysis, spelling changes, explanation of grammatical choices, and comparison of informal and more precise word choices.