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Spelling Grades 3–4: Rules, Tricky Words and Study Plan

Grades: Grades 3–4 · By the BrainBucks team · Updated October 2026

By third grade, spelling shifts from sounding out simple words to using rules about word parts, endings and word meaning. The same few rules explain hundreds of words, so it is worth teaching them directly.

Rules for adding endings

Doubling rule: in a one-syllable word with one vowel and one ending consonant, double the final consonant before adding -ing or -ed: hop → hopping, hopped; run → running; stop → stopped.
Drop the e: if a word ends in silent e, drop it before adding an ending that starts with a vowel: make → making; bake → baked; hope → hoping.
Change y to i: if a word ends in a consonant plus y, change the y to i before adding -es or -ed: cry → cries, cried; baby → babies; happy → happier. Keep the y for -ing: crying.
Plurals: add -s to most words, -es after s, x, z, ch, sh (wishes, boxes). Some are irregular: child → children, mouse → mice, foot → feet.

Prefixes and suffixes

Part	Meaning	Examples
un-	not	unhappy, unfair, unlock
re-	again	redo, rewrite, replay
pre-	before	preview, preheat
-ful	full of	careful, thankful
-less	without	helpless, endless
-ly	in a way	slowly, quietly

Note that adding a prefix does not change the spelling of the base word: un + necessary = unnecessary keeps both n's.

Homophones

Homophones sound the same but have different meanings and spellings. Teach them with memory hooks:

their / there / they're: their shows ownership; there is a place (it contains "here"); they're = they are.
to / too / two: too means also or very (it has extra o's); two is the number.
your / you're: you're = you are.
hear / here: you hear with your ear.
write / right, new / knew, ate / eight, sea / see.

Silent letters

Many silent letters are leftovers from older pronunciations: knife, knee, know (silent k), write, wrong, wrap (silent w), lamb, thumb, climb (silent b), gnat, gnome (silent g), island, listen (silent s and t). Say the word with an exaggerated pronunciation to remember the hidden letter: "kuh-nife."

Commonly misspelled words in these grades

because, friend, beautiful, different, favorite, special, enough, thought, through, though, answer, believe, probably, people, library, February, Wednesday, together, neighbor, usually

Trick words: make up silly sentences: "A friend is a friend to the end." "Because: big elephants can always understand small elephants." Let your child invent their own; kids remember the ones they create.

A weekly study plan

Pre-test on Monday to find which words are already known.
Study only the missed words: write each one three times, then make a sentence for it.
Group the words by rule or pattern, and say the rule aloud.
Practice with a parent quizzing aloud for five minutes on Wednesday and Thursday.
Friday test, then add missed words to next week's list.

Practice quiz

Fix the spelling or choose the correct word.

Add -ing to swim.
Add -ed to bake.
Make puppy plural.
Choose: Put the books (their / there / they're) on the shelf.
Choose: (Your / You're) going to love this game.
Which is correct: wrap or rap for "to cover a gift"?
Spell the word that means "not happy" using a prefix.
Correct the spelling: frend, becuase, diferent

Answer key

1) swimming 2) baked 3) puppies 4) there 5) You're 6) wrap 7) unhappy 8) friend, because, different

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