Why Decoding Is Not Optional

In conversations about reading instruction, one idea sometimes gets overlooked: students must be able to decode words in order to read successfully.

Decoding is the ability to translate written letters into the sounds they represent and blend those sounds into words. It is the process that allows a reader to look at an unfamiliar word and figure it out.

Without decoding, reading becomes guessing.

A student may memorize some words or rely on pictures and context, but those strategies break down quickly as texts become more complex.

Decoding is what gives students independence as readers.

Reading Is a Language Code

Written English is a code for spoken language.

Letters and letter combinations represent sounds, and those sounds combine to form words. Skilled readers automatically connect print to speech through this sound–symbol system.

When students understand this code, they can read words they have never seen before.

When they do not, reading becomes slow, effortful, and often inaccurate.

This is why strong reading instruction focuses on the alphabetic principle—the understanding that letters represent sounds in predictable ways.

Reading Failure Is Predictable

One of the most important findings in reading research is that reading failure is not random.

Decades of research show that early weaknesses in phonemic awareness, letter–sound knowledge, and decoding strongly predict later reading difficulties (Torgesen, 2004; Snow, Burns, & Griffin, 1998).

In other words, the signs appear early.

Students who struggle to:

• hear and manipulate sounds in words

• connect sounds to letters

• decode unfamiliar words

are far more likely to experience reading difficulties in later grades.

When these skills are not explicitly taught and strengthened early, the gap between struggling readers and their peers often widens over time.

The encouraging news is that this also means reading success is predictable when instruction is aligned with how reading develops.

When students receive explicit instruction in phonemic awareness, phonics, and decoding, most reading difficulties can be prevented or significantly reduced.

Guessing Is Not Reading

For many years, some reading instruction encouraged students to use strategies such as:

• looking at pictures

• using context clues

• skipping unknown words

• or predicting based on the first letter

While context can support comprehension, it cannot replace decoding.

Research consistently shows that skilled readers rely primarily on rapid word recognition built through decoding, not guessing strategies (Ehri, 2014; Castles, Rastle, & Nation, 2018).

When decoding is weak, students often:

• avoid challenging texts

• read slowly and with errors

• struggle with spelling

• lose confidence in their reading ability

Over time, these difficulties can compound.

Decoding Builds the Reading Brain

As students repeatedly decode words, the brain begins to store them in memory through a process called orthographic mapping.

This allows readers to recognize words instantly without needing to sound them out each time.

But this process only works when students:

• can hear the sounds in words (phonemic awareness)

• know the letter–sound relationships (phonics)

• and apply those skills while reading and spelling

Decoding is the bridge that connects these skills and allows the brain to build a strong reading system.

Decoding Supports Comprehension

Some people worry that focusing on decoding takes time away from comprehension.

In reality, the opposite is true.

When students can decode efficiently, their mental energy is freed up to focus on meaning, vocabulary, and understanding the text.

Strong decoding makes comprehension possible.

Decoding is not just one reading skill among many.

It is the foundation that allows readers to access written language.

When students are taught how the sound–symbol system works, they gain the tools to read unfamiliar words, build vocabulary, and grow as confident readers.

Without decoding, reading remains fragile.

With it, students gain access to the full power of literacy.