Helping Students Expand Informational Writing One Sentence at a Time

Many students can identify strong facts during informational writing, yet still struggle to turn those facts into clear, meaningful sentences. They know what they want to say, but not how to say it in writing.

Sentence expansion routines give students a structured way to work with language before they’re expected to write full informational paragraphs. In my classroom, I use Genius Paragraphs and Stretch a Sentence to help students practice building stronger sentences using content they already understand.

This post shares how I use these routines to support informational writing without overwhelming students.

Where This Fits in the Informational Writing Unit

Before using sentence expansion routines, students need a foundation:

• background knowledge about a topic
• a shared set of facts
• experience sorting and organizing information

I’ve shared that full process in my Informational Writing Unit series, where students practice gathering, organizing, and writing about informational topics. Once students reach that point, sentence work becomes far more productive because they are no longer inventing ideas — they are refining how those ideas are written.

Using Genius Paragraphs to Build Sentence Awareness

To help students work with sentence structure, I use the Genius Paragraph routine adapted for elementary writers.

We start with a simple sentence and gradually add layers:

• adjectives
• prepositional or adverbial phrases
• reasons or explanations

For example, during our work on polar bears:

• Simple: The polar bear swims.
• Expanded: The white polar bear swims to find food.
• Developed: The white polar bear swims in the cold ocean because it is hungry.

Working through these steps as a class allows students to hear, see, and manipulate language without the pressure of writing everything independently.

Step 1: Gathering Facts

The first step is to gather facts about the topic. In this case, we were writing about polar bears. You can read more about how we gather facts in the writing process post, in the finding-related facts post, and in the organizing facts post. For now, we just listed the facts that students knew and discovered in their research.

Step 2: Expanding Sentences

To help students be more successful with writing complex sentences, I started using the Genius Paragraph routine from Whole Brain Teaching. This routine makes sentence structure visible and gives students a clear way to add meaning without guessing.

Here is our Genius Paragraph that we completed as a whole class:

Step 3: Practicing Sentence Expansion

The next day, we practiced the same routine using slides from the WBT website. We worked through a Genius Paragraph together, trading out words and phrases to build sentences. Students got a little silly—but that engagement made the language work stick.

I used the given sentence in the slide as a type of sentence construction chart, where we just traded out the word or phrase.

Why Sentence Expansion Helps Informational Writing

Most of my students are English learners, and extending sentences does not come naturally. Asking them to “add more detail” is often too vague.

Sentence expansion routines:

• reduce language guesswork
• keep the focus on meaning
• connect directly to informational content

Because students already understand the facts, they can focus on how sentences work, not on generating new ideas.

Applying Sentence Work to New Topics

Once students understand the routine, we apply it to different informational topics.

When we studied caribou, students worked with the same sentence structure but new content:

• Base: Caribou migrate.
• Expanded: Fast caribou migrate when the seasons change.

I gradually removed scaffolds, leaving only partial sentence starters so students had more flexibility. This step was challenging, but it revealed exactly where students still needed support — especially with extenders and academic language.

Moving from Sentence Work to Paragraph Writing

After each Genius Paragraph activity, students wrote a short informational paragraph.

Early on, I allowed students to copy the shared paragraph. Later, I required them to write their own supporting sentences that matched the topic sentence.

This step made it clear that:

• sentence quality directly affects paragraph clarity
• facts must stay connected to the topic sentence
• cohesion takes repeated practice

Students were not perfect — and that was expected. The goal was growth, not polish.

How Stretch a Sentence Supports This Same Skill

While Genius Paragraphs work well for whole-group instruction, Stretch a Sentence gives students structured, independent practice with the same sentence skills.

Stretch a Sentence:

• breaks sentence expansion into manageable steps
• supports students who need more structure
• reinforces the same sentence skills used in informational writing

Together, these routines help students turn strong facts into clear, connected sentences — a critical step in informational writing.

Related Resources

If you’re building an informational writing unit, these resources support the same routine:

• Informational Writing Tools – fact sorts, organizers, checklists, and lesson support
• Stretch a Sentence – structured sentence expansion practice
• Genius Paragraph Labels – visual sentence-building support for whole-group instruction

Free Informational Writing Resource

If you’d like to try this approach with your students, you can start with a free informational article about frogs. It includes:

• a fact sort
• a photo article
• a text-only version
• QR codes