Word Study — Suffixes (-tion, -able, -ness, -ly)

Suffixes change what a word does. 'Act' is a verb; 'action' is a noun; 'active' is an adjective; 'actively' is an adverb. The suffix is the control — wrong suffix, wrong part of speech. Indirect aim: part-of-speech mastery, vocabulary generation, spelling patterns.

• Framework: Montessori
• Unit: Language
• Learning area: Word Study
• Level: Ages 7-9

Objectives

• Identify common English suffixes and their meanings
• Recognize how suffixes change part of speech
• Generate new words by adding suffixes
• Spell correctly with suffix rules

Materials

• Suffix cards (-tion, -able, -ness, -ly, -ment, -ful, -less, -er, -est)
• Root-word cards
• Control chart
• Word journal

Instructions

1. Lay suffix cards in a row. 2. Match with root 'act': act (verb), action (noun), active (adjective), activity (noun), actively (adverb). 3. Repeat with 'happy': happiness (noun), happily (adverb). 4. Learn spelling rules: y → i before -ness; double consonant before -ing. 5. Generate word families on paper. 6. Circle suffixes in a paragraph. 7. Chart: suffix | meaning | example. 8. File in Word Study binder.

Educator tip

Suffix changes part of speech — this is the master insight. Children should be able to trace a root through all four parts of speech.

Assessment

Observe suffix identification, correct part-of-speech change, and spelling accuracy.

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