One More Sheet.

1st Grade Capitalizing Sentences and I Worksheets

First graders apply both rules automatically in their own writing and catch the classic slips: a sentence that starts small, a lowercase i, or a stray capital in the middle of a sentence. Choosing the correct version from near-twins builds the editor's eye.

Free printable PDF, aligned to Common Core L.1.2.a. One skill per page, answer key on page two.

Every sheet is one of a kind and prints with a version code, so you can reprint the exact same one later. New version every click.

A sample 1st grade sheet. Yours will have different sentences. Click it to print your own.

The kind of sentences you'll fix

Cross out each small letter that should be a capital, and write the capital above it.

  1. the corn is hot.

    Fixed: The corn is hot.

  2. the tub is full.
  3. the bun is warm.

Every print draws a fresh mix of sentences at this level, so a make-up test or a second sibling gets a different sheet.

What's on each sheet

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

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One page, answer key included. A fresh version every time you click.

Aligned to Common Core L.1.2.a. Reviewed by the One More Sheet curriculum team. Content version 68, updated July 2026.