Dashes and Parentheses for Emphasis

Active learning builds students’ metacognitive control over punctuation by making abstract marks feel concrete. When learners physically manipulate dashes, commas, and parentheses in real sentences, they notice how each mark shifts the reader’s attention. This kinesthetic and collaborative approach turns a dry convention into a strategic tool they can choose and justify.

• 9th Grade
• English Language Arts
• 3 activities
• 20 min–35 min

Learning Objectives

1. Compare the stylistic impact of dashes versus parentheses when inserting explanatory or supplementary information into sentences.
2. Analyze how the choice between dashes, parentheses, and commas affects the perceived voice and tone of a written passage.
3. Revise sentences to effectively employ dashes and parentheses for emphasis, clarification, or to create a specific authorial voice.
4. Evaluate the rhetorical effectiveness of different punctuation choices in published texts.

Think-Pair-Share

⏱ 20 min·Pairs

Think-Pair-Share: Same Words, Different Marks

Give students three versions of the same sentence, one using a dash, one using parentheses, and one using a pair of commas, to set off the same phrase. Students individually write one sentence describing how each version feels different to read, then compare with a partner before the class builds a shared description of each mark's effect.

Prepare & details

When is a dash more appropriate than a set of parentheses for adding information?

Facilitation Tip: During Think-Pair-Share, circulate and listen for students describing the emotional tone of the inserted phrase, not just labeling the mark.

Setup: Standard classroom seating; students turn to a neighbor

Materials: Discussion prompt (projected or printed), Optional: recording sheet for pairs

• Understand
• Apply
• Analyze
• Self-Awareness
• Relationship Skills

Chalk Talk

⏱ 30 min·Pairs

Writing Workshop: Voice Through Punctuation

Students write a short paragraph (8-10 sentences) on any topic they know well, intentionally including one dash and one set of parentheses. They then annotate why they chose each mark in that location. Partners read each other's paragraphs and identify whether the punctuation choice matches the writer's stated intention.

Prepare & details

How can punctuation be used to create a specific 'voice' or tone in a text?

Setup: Large papers on tables or walls, space to circulate

Materials: Large paper with central prompt, Markers (one per student), Quiet music (optional)

• Understand
• Analyze
• Evaluate
• Self-Awareness
• Self-Management

Gallery Walk

⏱ 35 min·Small Groups

Gallery Walk: Punctuation in Published Prose

Post 8 excerpts from published essays, journalism, and literary nonfiction around the room, each featuring a distinctive use of dash or parentheses. Groups annotate the effect and purpose of each mark, then the class debriefs by categorizing uses: emphasis, aside, definition, appositive, tone shift.

Prepare & details

Compare the impact of using dashes versus commas to set off an appositive phrase.

Setup: Wall space or tables arranged around room perimeter

Materials: Large paper/poster boards, Markers, Sticky notes for feedback

• Understand
• Apply
• Analyze
• Create
• Relationship Skills
• Social Awareness

Teaching This Topic

Teachers should model reading the sentence aloud with and without the aside, emphasizing how dashes create a dramatic pause and parentheses shrink the aside into a whisper. Avoid teaching dashes as a ‘stronger comma’; instead, frame them as a spotlight. Research shows that pairing revision with oral reading deepens students’ understanding of punctuation’s rhetorical power.

What to Expect

Successful learning looks like students explaining why they placed a dash or parentheses in a specific spot and what tone that choice creates. Students should move from simply inserting marks to articulating the effect on the reader. You’ll hear them justify their punctuation with evidence from the text they revised.

Watch Out for These Misconceptions

Common Misconception

During the Think-Pair-Share activity, watch for students who say dashes and parentheses are interchangeable, both just add extra information.

What to Teach Instead

During the Think-Pair-Share activity, give students the same sentence with the same inserted phrase marked by a dash and then by parentheses. Ask them to read both versions aloud and describe the difference in the reader’s focus and emotional reaction. Their responses should reveal that the dash emphasizes while the parentheses downplay.

Common Misconception

During the Writing Workshop, students may claim that using dashes frequently signals strong, emphatic writing.

What to Teach Instead

During the Writing Workshop, share mentor sentences from published writers that use one dash per paragraph. Ask students to revise their own drafts to include no more than one dash per paragraph and justify their choice in a margin note. Their reflections will show that restraint, not frequency, creates emphasis.

Assessment Ideas

Quick Check

After the Think-Pair-Share activity, give students three sentences with the same inserted phrase marked by commas, dashes, and parentheses. Ask them to write one sentence explaining which mark creates the strongest emphasis and why, then share responses with a partner.

Exit Ticket

During the Writing Workshop, present students with a short paragraph containing an aside. Ask them to rewrite the paragraph twice: once using dashes for the aside and once using parentheses, then write two sentences explaining the difference in tone each version creates before submitting their exit ticket.

Peer Assessment

After the Gallery Walk, students exchange sentences they revised to include an appositive phrase using either dashes or parentheses. Partners identify the punctuation used and write one sentence evaluating whether the chosen punctuation effectively highlights or downplays the appositive information, then return feedback to the writer.

Extensions & Scaffolding

• Challenge students who finish early to find a published sentence with dashes, revise it to use parentheses, and write a paragraph explaining how the writer’s intention changed.
• Scaffolding: Provide a word bank of tone words (urgent, casual, formal) and a sentence stem: ‘This version feels ___ because ___.’
• Deeper exploration: Have students collect three examples of dashes in public writing (ads, op-eds, social media) and present how each mark shapes the reader’s response.

Key Vocabulary

em dash	A punctuation mark used to indicate a sudden break in thought, an interruption, or to set off a strong parenthetical statement. It signals a more emphatic interruption than parentheses.
parentheses	Punctuation marks used to enclose supplementary information, explanations, or asides that are considered less essential to the main sentence structure. They signal a softer, more detached insertion.
aside	A remark or passage in a book, play, or other work that is intended to be heard by the reader or audience but not by other characters in the work. In writing, this often uses parentheses or dashes.
appositive phrase	A noun or noun phrase that renames another noun right beside it. It can be essential or nonessential, affecting punctuation choices like commas, dashes, or parentheses.