Heart Words vs. Sight Words: What’s the Difference—and When to Use Each

Same goal—instant, accurate reading. Different path: map sounds to spellings and only “learn by heart” the unpredictable parts.

Last updated: September 5, 2025

Teacher modeling how to mark a heart over a tricky part in the word said

Introduction

Sight words (in modern, research-based use) means any word a student can read instantly—after it’s been mapped to memory. Heart words are high-frequency words with one or more tricky spellings students must “learn by heart” after mapping all the regular parts with sounds. Don’t teach giant lists by rote. Teach sounds → spellings → mark only the unpredictable bits with a heart.

What Are Sight Words?

“Sight word” is an outcome, not a method. A sight word is any word a student recognizes instantly—because the brain has securely mapped its sounds and spellings (orthographic mapping). This includes regular decodable words (cat, into) and irregular high-frequency words (said, was) once learned.

What Are Heart Words?

Heart words are the subset of high-frequency words that contain one or more unpredictable spellings for beginners. We teach them by mapping every predictable part with phoneme–grapheme knowledge and marking the tricky part with a small heart. Example: said — the ai doesn’t make its usual /ā/; students “learn that part by heart.”

Key Differences at a Glance

Feature Sight Words Heart Words
Meaning Any word read instantly (automatic) HFWs with parts to memorize “by heart”
Teaching Focus Orthographic mapping via sounds→letters Map regular parts; mark only irregular bits
Examples and, into, like (once mapped) said, was, one, of
What to Avoid Rote visual memorization without sounds Putting hearts on predictable spellings
Goal Accurate, instant recognition in text Make tricky spellings stick—then automatic

How to Teach Them the Right Way (Step-by-Step)

  1. Say it, tap it: Students say the word naturally in a sentence (I said yes.).
  2. Stretch sounds: Oral phoneme analysis (/s/ /e/ /d/ for said).
  3. Map to print: Write graphemes for each sound. Circle the predictable parts; heart the unpredictable part.
  4. Encode then decode: Build → read → write the word in phrases/sentences.
  5. Spaced practice: Revisit across the week in short bursts within decodable text.

Coach’s take: Treat “sight words” as the result of mapping, not a giant guessing list. Your future you will thank you.

Free Activities & Games (Click & Go)

Map Sounds to Spellings (Foundational)

Build Automaticity with High-Frequency Words

Bridge to Continuous Text (Decoding + Fluency)

Need a custom HFW list (e.g., said, were, does, come, some)? ➕ Build your own ABZ game in minutes and assign it to centers or home practice.

Assessment & Progress Monitoring

Keep it fast, frequent, and focused on automaticity + accuracy. Use this mini-dashboard:

Measure Quick Probe K–2 Target Frequency ABZ Tool/Game
Instant Recognition Read 20 HFWs (1s time cap) ≥ 90% correct Bi-weekly Reading Fruit Ninja
Encoding (Spelling) Write 10 target HFWs in dictation 8+/10 correct Bi-weekly Stitch’s Spelling Quest
Transfer to Text Read 100-word decodable ≥ 95% acc. & steady rate Monthly Read & Race

Pro tip: If accuracy is high but speed is low, keep words in spiral review for another week and increase oral→print→text reps.

FAQs

Should I still use “sight word lists”?

Yes—but teach each word through sounds→letters first. Use lists for sequence, not for rote visual memorization.

Which words need a heart?

Only the unpredictable graphemes for beginners (e.g., said = s + ♥ai + d). Don’t heart what students can decode with taught patterns.

How soon do I connect to real reading?

Immediately. After mapping, place the word in decodable sentences and short texts the same day.

Do older strugglers need heart words?

Often yes. A short cycle of map→heart→encode→read closes gaps fast, especially when paired with targeted phonics.

Conclusion

Make it make sense, not magic. Map the sounds, mark the curveballs, and move into text. That’s how “sight words” become truly in sight—and how readers fly.

Explore all ABZ Learning resources or create a custom HFW game in minutes.

Student celebrating after reading heart words in a decodable text