Third Grade reading & spelling words
Third grade is the jump from short words to long ones. Children meet prefixes (un-, re-, dis-, in-) and suffixes (-ful, -less, -er) and learn that a long word is usually several small, known pieces stacked together. That single insight is what stops a struggling reader from freezing when a word runs past six letters.
Skills covered in Third Grade
- Prefixes: unhappy, replay, disagree, invite
- Suffixes: careful, painless, teacher
- Breaking multi-syllable words into parts
- Homophones: their, there, they're — to, too, two
- Silent letters: knight, wrist, thumb, comb
Who should start at this level?
- Your child gives up on any word longer than about six letters
- They mix up their/there or to/too in writing
- A fourth or fifth grader reading below grade level
- A child who has second-grade vowel teams under control
Sample Third Grade words
A dozen words taken from the first four weeks of the third grade sets.
- happy
- funny
- sunny
- shadow
- yellow
- window
- stormy
- chilly
- chatty
- invite
- include
- impress
Try a 60-second activity at home
Split it: "unhappy"
- 1Flash the word, then hide it.
- 2Ask your child to say the two pieces: un + happy.
- 3Have them write the whole word from memory.
- 4Ask what un- did to the meaning — this connects spelling to comprehension.
The sixteen Third Grade weeks
Week 1
happy, funny, sunny…
10 words
Third Grade · Week 2Week 2
shadow, yellow, window…
10 words
Third Grade · Week 3Week 3
stormy, chilly, chatty…
10 words
Third Grade · Week 4Week 4
invite, include, impress…
10 words
Third Grade · Week 5Week 5
unhappy, unable, unfair…
10 words
Third Grade · Week 6Week 6
replay, rewind, rebuild…
10 words
Third Grade · Week 7Week 7
painless, careless, harmless…
10 words
Third Grade · Week 8Week 8
careful, joyful, helpful…
10 words
Third Grade · Week 9Week 9
teacher, farmer, painter…
10 words
Third Grade · Week 10Week 10
their, there, theyre…
10 words
Third Grade · Week 11Week 11
bicycle, triangle, calendar…
10 words
Third Grade · Week 12Week 12
celebrate, interrupt, understand…
10 words
Third Grade · Week 13Week 13
quiet, quick, quart…
10 words
Third Grade · Week 14Week 14
knight, knee, knot…
10 words
Third Grade · Week 15Week 15
measure, treasure, pleasure…
10 words
Third Grade · Week 16Week 16
disagree, disappear, dishonest…
10 words
Ready for the full week?
Start a whole week of 3 word sets free. No account needed.
Questions parents ask about Third Grade
My child reads long words by guessing from the first letter. How does this help?
Flashing removes the chance to guess slowly from context, so the child learns to take in the whole shape of a word, and prefix work gives them reliable pieces to hold onto.
Is third grade a good starting point for an older struggling reader?
Often, yes. Many older students decode short words fine and fall apart on multi-syllable words, which is exactly what this level rebuilds.