4th Grade · Core Spelling
Commonly Confused Words
A fourth-grade commonly confused words list that helps students choose the right spelling for words that sound alike or look similar in writing.
These spelling words are a good fit for students who...
- can revise sentences for meaning and notice when a familiar word choice looks wrong
- understand that some confusing words sound alike while others are confused because they look similar or are used in similar contexts
- use academic and narrative writing often enough for word-choice errors to affect clarity
Word list
The 13 words to practice in this step
4th Grade · Core Spelling
- there
- their
- they're
- its
- it's
- than
- then
- accept
- except
- affect
- effect
- principal
- principle
13 words
Spelling Skill
Commonly Confused Words
Learn how this spelling pattern works, see examples, common mistakes, and teaching guidance.
Explore the Commonly Confused skill →Why these words — and what they teach
These thirteen words form six contrasts that continue to cause errors in longer 4th Grade writing: there/their/they’re, its/it’s, than/then, accept/except, affect/effect, and principal/principle. Some sound alike; others look similar or occur in similar sentences. In every group, sentence meaning identifies the intended word, and then the student must spell that word accurately.
Keep two kinds of error separate. A selection error happens when a learner writes a real word correctly but chooses the wrong member, such as their for there. A spelling error happens when the intended member is clear but its letters are wrong. The first calls for a quick meaning check; the second calls for focused spelling correction.
How to practice this list
Practice one contrast group with short oral sentences. Ask what the sentence means, have your child name the intended word, and then remove the model before they write it. For there/their/they’re and its/it’s, a brief expansion check can identify the contraction; stop there rather than turning the activity into a grammar lesson.
When the wrong member is selected, do not mark it as a misspelling. Ask a short question that restores the intended meaning—place, belonging to them, or they are, for example—and let them replace the word. When the intended member is misspelled, keep the choice and correct only its uncertain letters or apostrophe. Retest the complete word later in a different sentence.
Choosing the wrong member of a pair is a different kind of mistake from a true misspelling, and naming that difference out loud keeps it from feeling like a bigger error than it is.
Mix all six groups once individual contrasts are secure. The learner is ready to continue when they can select and spell the intended member in new sentences, explain whether a mistake was a choice or a spelling error, and use the matching correction without prompting.
Common questions
Frequently asked questions
- Why does this list review some 3rd Grade words?
- Words such as there, their, they're, its, and it's continue to cause errors in longer fourth-grade writing. Reviewing them alongside than, then, accept, except, affect, effect, principal, and principle helps students apply the same meaning-based thinking.
- Are commonly confused words always homophones?
- No. Some sound alike, but others are confused because they look similar or appear in similar kinds of sentences. Fourth graders need to compare both spelling and meaning.
- How can a teacher tell whether a student is ready for this page?
- A ready student can already spell many high-frequency words but still needs support choosing the exact word in explanations, reports, and stories. If a student can discuss what a sentence means, this list is useful.
- What is a good follow-up after these words?
- Derived Words and Word Meaning is the natural next step. It closes the fourth-grade sequence by showing how a base word's spelling stays stable across a whole family of related words.