Dyslexia is a neurobiological learning difference that primarily affects accurate and fluent word reading, spelling, and decoding. It is one of the most common learning differences and occurs across all levels of intelligence, backgrounds, and educational experiences.

Students with dyslexia often have difficulty connecting speech sounds to letters and letter patterns, making it harder to read unfamiliar words, develop automatic word recognition, and spell accurately. These challenges are not the result of low intelligence, lack of motivation, or poor instruction.

While dyslexia can make learning to read more difficult, it does not prevent students from becoming successful readers. With early identification and evidence-based instruction, students with dyslexia can make significant progress in reading and achieve academic success.

Dyslexia is most commonly associated with difficulties in phonological processing, the ability to recognize, manipulate, and work with the sounds in spoken language. Because reading requires students to connect sounds to letters, challenges with phonological processing can make learning to read and spell more difficult.

Students with dyslexia may struggle to:

• recognize and manipulate speech sounds
• learn letter-sound correspondences
• decode unfamiliar words
• develop reading fluency
• spell accurately
• recognize words automatically

These difficulties often become more noticeable as reading demands increase and students encounter longer, more complex texts.

Importantly, dyslexia is not a reflection of intelligence. Many individuals with dyslexia are highly capable learners who excel in areas such as problem-solving, creativity, critical thinking, and verbal reasoning.

The signs of dyslexia can vary from student to student and may change over time. Understanding common indicators can help educators and families identify students who may benefit from additional assessment and support.

Early Signs of Dyslexia

In preschool and kindergarten, students may have:

• Difficulty recognizing and producing rhymes
• Trouble learning nursery rhymes, songs, or word patterns
• Difficulty remembering sequences such as days of the week or counting routines
• Challenges learning letter names and sounds
• Trouble identifying beginning sounds in words
• Delayed speech or language development
• Difficulty following multi-step verbal directions

Signs of Dyslexia in Elementary School

As reading instruction becomes more formal, students may have:

• Difficulty learning sound-symbol relationships
• Slow acquisition of foundational reading skills
• Trouble blending sounds to read words
• Difficulty decoding unfamiliar words
• Frequent guessing while reading
• Persistent spelling errors
• Difficulty remembering common sight words
• Avoidance of reading activities

Signs of Dyslexia in Elementary School

Upper elementary students may have:

• Slow or laborious reading
• Difficulty reading multisyllabic words
• Weak spelling despite instruction
• Reduced reading fluency
• Difficulty completing reading assignments independently
• Challenges learning academic vocabulary
• Avoidance of independent reading

Signs of Dyslexia in Secondary Students

Older students may:

• Slow reading rate compared to peers
• Difficulty reading unfamiliar academic vocabulary
• Ongoing spelling difficulties
• Reading fatigue during lengthy assignments
• Challenges taking notes while listening
• Difficulty organizing ideas in writing
• Strong verbal abilities that exceed reading and writing performance

Patterns of difficulty with word reading, spelling, and phonological processing may indicate the need for further evaluation. Dyslexia. A formal dyslexia diagnosis can only be made by professionals with specialized training in psychology, education, and language, such as licensed educational psychologists, clinical psychologists, or neuropsychologists. Other qualified experts who can diagnose dyslexia include speech-language pathologists (SLPs) and certified dyslexia specialists. 

Researchers have spent decades studying dyslexia and continue to deepen our understanding of its underlying causes. Current research suggests that dyslexia is primarily related to differences in how the brain processes language, particularly speech sounds. These differences can make it more difficult for students to develop the sound-symbol connections necessary for skilled reading. Dyslexia also can run in families, indicating that there might be a strong genetic component. A student with a parent or sibling who has dyslexia is more likely to experience reading difficulties as well.

It is important to understand what dyslexia is not.

Dyslexia is NOT caused by:

• low intelligence
• lack of motivation
• poor vision
• letter reversals alone
• inadequate effort

While students with dyslexia may experience some of these challenges as a result of reading difficulties, they are not the root cause of dyslexia.

The Science of Reading has helped researchers better understand why students with dyslexia struggle and what types of instruction are most effective.

Reading requires students to develop strong skills in:

• phonological awareness
• phonemic awareness
• phonics
• decoding
• spelling
• word recognition
• language comprehension

Students with dyslexia often require more explicit and systematic instruction in these areas because they may not acquire these skills as easily through exposure alone.

Research has shown that skilled readers build a large bank of instantly recognizable words through a process called orthographic mapping. Orthographic mapping helps students connect sounds, spellings, and meaning so words can be stored for automatic recognition.

Because students with dyslexia often struggle with these sound-symbol connections, instruction that strengthens phonological awareness, phonics, decoding, and spelling can play a critical role in reading development.

Research consistently supports explicit, systematic, and structured literacy instruction for students with dyslexia.

Effective instruction includes:

• direct teaching of phonemic awareness
• explicit phonics instruction
• systematic decoding practice
• spelling instruction connected to reading
• cumulative review of previously taught skills
• opportunities to apply learning in connected text

Instruction should be carefully sequenced, moving from simpler concepts to more complex skills while providing students with multiple opportunities for practice and feedback.

For example, a student struggling to read multisyllabic words may receive explicit instruction in syllable types, syllable division patterns, morphology, and decoding strategies. Rather than relying on context clues or guessing, the student learns how words work and develops the tools needed to read unfamiliar words independently.

Structured literacy approaches are particularly effective because they make the structure of language visible and teach students how sounds, letters, syllables, and meaningful word parts work together.

Dyslexia can make learning to read more challenging, but it does not limit a student's potential.

When students receive evidence-based instruction grounded in the Science of Reading, they can develop the foundational skills needed for accurate, fluent, and confident reading. Early identification, targeted intervention, and structured literacy instruction can help students overcome reading challenges and build long-term literacy success.

By understanding what dyslexia is, recognizing its signs, and implementing effective instructional practices, educators and families can provide the support students need to thrive both in school and beyond.