1st grade capitalizing sentences and I worksheets
First graders catch the classic slips (a sentence that starts small, a lowercase i, a stray capital mid-sentence) by choosing the correct version from near-twins, which builds the editor's eye.
Free printable PDF worksheet, aligned to Common Core L.1.2.a.
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The kind of sentences you'll fix
Cross out each small letter that should be a capital, and write the capital above it.
-
the keys are on the hook.
Fixed: The keys are on the hook.
- the box is full of hats.
- the bus is here.
Every print pulls a fresh set of sentences at this level, so a make-up test or a second sibling never gets the same sheet.
What's on each sheet
- Fix it. Cross out each small letter that should be a capital, and write the capital above it. 6 sentences to fix per page.
- Choose the sentence. Circle the letter of the sentence with the correct capital letters. 6 questions per page.
Every version prints on US Letter or A4, with its answer key on the last page.
How to teach this
The sneaky option on these sheets caps the wrong word (the Cat is big). Ask why it's wrong, not just which is right; "capitals start sentences, and cat isn't a name" is the reasoning that transfers. Lowercase i is worth its own minute; it hides in kids' writing for years if nobody names it.
Watch for: Only the first word gets the starting capital; the other words stay small unless they're names. The word I is capital even in the middle of a sentence.
Common questions about capitalizing sentences and I
- What's the most common capitalization error in 1st grade?
- The lowercase i, by a mile, with missing sentence capitals close behind. Both appear as wrong choices on these worksheets so students learn to catch them on sight, which is easier than remembering rules mid-sentence while writing.
- How do I build the habit in real writing?
- A two-second check at the end of every sentence: first letter tall? Any lonely i's? Rituals beat rules at this age. A child who rereads one line of their own writing for capitals daily will stop making the error within weeks.
Related worksheets
- Kindergarten capitalizing sentences and I A step easier, same skill
- 1st grade capitalizing names and dates Same grade, nearby skill
- Capitalizing sentences and i, all grades The full progression
- All 1st grade English worksheets Every skill at this level
- All 1st grade worksheets Everything at this level
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Aligned to Common Core L.1.2.a. Reviewed by the One more sheet team. Content version 137, updated August 2026.
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