Heart word practice aligned to the Science of Reading for teaching high frequency words

How many times have you had a student get stuck on a high frequency word, even after repeated exposure?

You practiced was all week. Flash cards. Read it in context. Reviewed it again.

Then your student sees was and says:

/w/ /a/ /s/

Back to square one.

If this sounds familiar, you are not alone.

And here’s the good news:

High frequency words do not need to be memorized.

They need to be mapped.

In a Science of Reading aligned classroom, students learn high frequency words by connecting sounds to spellings through a process called orthographic mapping.

The heart word method gives students a structured way to do exactly that.

Here are the Downloadable Files — Heart Words (SOR-aligned):

 

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Heart Word Learning Objective

Students will identify the regular and irregular parts of a high frequency word by mapping phonemes to graphemes and marking the tricky portion.

 

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Materials Needed

Here are the materials you will need for this activity:

• a target heart word (example: was)
  
  
• sound boxes or mapping boxes
  
  
• letter tiles, magnetic letters, or dry erase marker
  
  
• heart word card or display
  
  
• student recording sheet or notebook
  
  
• a simple sentence using the target word
  
  

Optional:

• pocket chart
  
  
• highlighter
  
  
• heart word anchor chart or slide
  
  

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What Are Heart Words?

Heart words are high frequency words that contain at least one irregular sound-spelling.

Instead of memorizing the entire word, students:

• sound out the parts that follow phonics patterns
  
  
• identify the part that is unexpected
  
  
• “heart” only the tricky portion
  
  

This keeps instruction aligned to structured literacy and helps students store words in long-term memory more efficiently.

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Heart Word Activity Procedure

Step 1: Introduce the Target Word

Display the word for students.

For example, introduce the word was.

Say the word aloud and have students repeat it several times.

You might say:

“This is a word we see often when we read, so we want our brains to know it automatically.”

This step builds familiarity before analysis begins.

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Step 2: Say the Sounds in the Word

Guide students in segmenting the sounds in the word.

For was, students would say:

/w/ /u/ /z/

Have students tap or count each sound.

This step is critical because students must hear the sounds before mapping them to letters.

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Step 3: Map the Sounds to the Letters

Now connect each sound to the letters in the word using sound boxes or by writing the word together.

Walk through each part:

• w says /w/
  
  
• a is the tricky part because it does not say the expected short a sound
  
  
• s represents /z/ in this word
  
  

Help students notice which parts match their phonics knowledge and which part does not.

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Step 4: Heart the Tricky Part

Draw a heart over the irregular portion of the word.

In the word was, most students will identify the a as the heart part.

You might say:

“We can sound out the parts we know, and we will put a heart over the part we have to remember.”

This step ensures students are not memorizing the entire word, only the part that is not yet predictable.

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Step 5: Read the Word Again

Have students read the word again.

Point to each letter, say the sounds, then blend the word.

Repeat this several times so students connect the analysis back to fluent reading.

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Step 6: Write the Word

Have students write the word on a whiteboard, paper, or in a notebook.

Encourage them to:

• say the sounds as they write
  
  
• think about the heart part
  

Writing reinforces the connection between reading and spelling.

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Step 7: Read the Word in a Sentence

Place the word into a simple sentence.

Example:

He was on the rug.

Have students read the sentence aloud.

This helps students practice the word in connected text and supports automatic recognition during real reading.

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Why This Routine Works

This routine supports orthographic mapping by helping students connect sounds to spellings in a structured way.

Students are:

• hearing and saying the word
  
  
• segmenting the sounds
  
  
• mapping phonemes to graphemes
  
  
• identifying the irregular portion
  
  
• reading and writing the word
  
  
• applying it in context
  
  

Instead of relying on memorization, students are building a mental map of the word that allows for faster and more accurate recognition over time.

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Tips for Using This Routine in the Classroom

This routine can be used in a variety of instructional settings.

Whole Group
Model the process and guide students through each step together.

Small Group
Provide additional support and allow students to practice with guidance.

Intervention
Slow the routine down and spend extra time analyzing the tricky portion.

Independent Practice
Once students know the routine, they can complete heart word mapping independently.

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Important Note About Heart Words

Not all high frequency words are heart words.

Some words are fully decodable based on students’ phonics knowledge. These are often called flash words.

Other words may be temporary heart words, meaning they only contain a tricky part because students have not yet learned that phonics pattern.

This is why heart word instruction should always align with your phonics scope and sequence.

Here are the Downloadable Files — Heart Words (SOR-aligned):

 

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Final Thoughts

High frequency words do not need to be memorized as whole words.

They need to be explicitly taught through sound-spelling connections so students can map them into memory.

When students say the word, segment the sounds, map the letters, heart the tricky part, write the word, and read it in context, they are building the foundation for automatic word recognition.

That is what makes heart word instruction so powerful in a Science of Reading classroom.

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