Sentence Building: Capitals and Periods Worksheet for Grade 1
Help first graders build complete sentences by starting with a capital letter and ending with a period. Download the free two-page printable and use the quick practice quiz to reinforce the rules.
This sentence building worksheet for Grade 1 gives children simple, structured practice with two important writing conventions: capital letters at the beginning of sentences and periods at the end. Students correct sentences, put words in order, and write their own ideas.
Capital Letters and Periods
A sentence tells a complete idea. In this worksheet, children practise two basic rules:
End with a period. A telling sentence usually ends with a period (.).
For example, “the boy kicks the ball” becomes “The boy kicks the ball.” The first letter changes to uppercase, and a period is added at the end.
Examples of Complete Sentences
Read these examples aloud. Ask the child to point to the capital letter and tap the period at the end.
- The dog is big.
- The sun is bright.
- She eats an apple.
- The cat is soft.
- He runs fast.
- The tree is tall.
Explain that a capital letter and a period help readers see where a sentence begins and ends. Children should also check that their words make sense together.
Download the Free Sentence Building Worksheet
The printable includes two pages: correcting sentences, unscrambling words, and writing original sentences from picture prompts. A separate text-only answer key is available for adults supporting the activity.
Student Worksheet
Pages 1–2 · Printable student copy
Practise capitals, periods, word order, and original sentence writing.
Download Worksheet PDFAnswer Key
Teacher / parent copy · Text only
Includes suggested answers for both pages. Responses to original writing may vary.
Download Answer Key PDFFor best results, print on Letter paper at actual size. Select “Fit” if you need to adapt the worksheet to another paper size.
How to Use This Grade 1 Worksheet
- Review the rules. Say “capital at the start, period at the end” together.
- Model one correction. Rewrite a lowercase sentence with a capital letter and a period.
- Complete Page 1. Students fix six sentences, checking the first letter and final punctuation.
- Complete Page 2. Students arrange word cards into a sensible order, then add the capital letter and period.
- Write original sentences. Invite students to describe each picture in a complete sentence.
- Read aloud and check. Have students read each sentence aloud and point to the first capital and final period.
Teaching tip
Use two coloured pencils: one to circle the capital letter and another to underline the period. This makes the two conventions easy to spot and encourages children to proofread their own work.
Skills practised
- Recognizing sentence beginnings and endings.
- Using uppercase letters and periods correctly.
- Sequencing words into a complete sentence.
- Writing a simple sentence about a familiar picture.
Try the Capitals and Periods Quiz
Choose the correctly written sentence for each question.
1. Which sentence is correct?
2. Which sentence is correct?
3. What belongs at the end of a telling sentence?
4. What kind of letter begins a sentence?
Frequently Asked Questions
What is a capital letter?
A capital letter is an uppercase letter, such as A or T. The first word in a sentence starts with a capital letter.
What is a period?
A period (.) is a punctuation mark that usually ends a telling sentence.
What does this worksheet teach?
It helps children correct sentences, arrange words in order, and write simple sentences using capital letters and periods.
Can I use this worksheet at home?
Yes. Parents can read the instructions with children and encourage them to read each completed sentence aloud.
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