Learning Disabilities Basics: Dyslexia, Dyscalculia and Dysgraphia

A learning disability is a lasting difficulty learning to read, write or do math that isn’t explained by low intelligence, poor teaching, or a vision or hearing problem. It comes from differences in how the brain processes information.^{5, 6}

Two definitions matter in the U.S. One is used by schools, the other by clinicians. They overlap a lot, but they aren’t the same.⁶

In school law: “specific learning disability”

The Individuals with Disabilities Education Act (IDEA) defines a specific learning disability as a disorder in one or more of the basic psychological processes involved in understanding or using language, spoken or written. It may show up as an imperfect ability to listen, think, speak, read, write, spell or do mathematical calculations. The definition names dyslexia as one example.⁷

It also says what doesn’t count: learning problems that are mainly the result of visual, hearing or motor disabilities, intellectual disability, emotional disturbance, or environmental, cultural or economic disadvantage.⁷

In medicine: “specific learning disorder”

Since 2013, the American Psychiatric Association’s diagnostic manual has combined reading, written expression and math into one diagnosis, specific learning disorder. The current edition is the DSM-5-TR (2022).^{6, 8} In plain English, a diagnosis needs four things:⁶

• Lasting difficulty in reading words, understanding what is read, spelling, written expression, number sense and calculation, or math reasoning, for at least six months despite targeted help.
• Skills well below what’s expected for the person’s age, measured with standardized tests and a full clinical assessment, and causing problems at school, work or in daily life.
• Starting in the school years, even if the problems only become serious later, when demands go up.
• Not better explained by intellectual disability, vision or hearing problems, a neurological condition, economic or environmental disadvantage, lack of instruction, or not yet knowing the language of teaching.

The diagnosis also notes the area affected and the severity: mild, moderate or severe.⁶

Disorder, disability or difference? “Specific learning disorder” is the clinical term. “Learning disability” is the term schools and laws use. Someone diagnosed with a specific learning disorder can expect to meet the criteria for a learning disability in school. Many families say “learning difference,” especially with children.⁶

A learning disability says nothing about how smart someone is.⁵ It can last a lifetime, and with the right support people can still succeed.⁵

These are the three areas the DSM-5-TR names: impairment in reading, in mathematics and in written expression.⁶ A person can have more than one learning disability.⁵

Dyslexia

The International Dyslexia Association updated its definition in October 2025. It describes dyslexia as a specific learning disability with difficulties in word reading and/or spelling, in accuracy, speed or both. These difficulties fall along a continuum of severity and persist even with instruction that is effective for the person’s peers.⁹ The causes are complex and combine genetic, neurobiological and environmental influences. Early oral language weaknesses often come before reading problems.⁹

Weak word reading has knock-on effects. Reading comprehension suffers, and reading less can slow growth in vocabulary, knowledge and writing.⁹ About 80% of people with a learning disorder have an impairment in reading.⁶

Dyscalculia

The DSM-5-TR specifier “with impairment in mathematics” covers weak number sense, trouble memorizing arithmetic facts, inaccurate or slow calculation, and inaccurate math reasoning.⁶ Because these basic skills feed later math, problem solving and quantitative reasoning are likely to suffer as well.¹⁰

Dysgraphia: one word, two meanings

“Dysgraphia” isn’t a separate DSM diagnosis. The DSM-5-TR uses the specifier “with impairment in written expression,” and the American Psychiatric Association uses dysgraphia to describe difficulty putting thoughts onto paper.⁶ The International Dyslexia Association and the Learning Disabilities Association of America use it more narrowly, for impaired handwriting: trouble writing letters (and often numerals) legibly and automatically.^{11, 12} A child can have only handwriting problems, only spelling problems, or both.¹¹ If a report says “dysgraphia,” ask which skills it means.

Our dyslexia-friendly style guide covers how to format handouts and web pages so they’re easier to read.

Learning disabilities often come with company. Reading disorders are highly comorbid with disorders of language, attention and math.¹³

Developmental language disorder (DLD)

DLD is a communication disorder that makes it hard to learn, understand and use language. It isn’t explained by hearing loss, autism or lack of exposure to language. It affects about 1 in 14 kindergartners and lasts into adulthood.¹⁴

DLD is not the same as a learning disability, but it is a risk factor for one. By adulthood, people with DLD are six times more likely to be diagnosed with reading and spelling disabilities, and four times more likely to be diagnosed with math disabilities, than people without DLD.¹⁴ A speech-language pathologist evaluates language skills.¹⁴

ADHD

ADHD is more common in children with learning disabilities than in children without them. Each needs its own treatment, and an NICHD-supported study found the two can be treated effectively at the same time.¹⁵ A review of 17 studies from 2001 to 2011 found an average co-occurrence rate of 45.1% between ADHD and learning disabilities.¹⁶ The authors recommend checking academic skills as part of any ADHD evaluation.¹⁶ See our ADHD basics guide and our overview of executive function.

Anxiety and low self-esteem

A child with a learning disability may struggle with low self-esteem, frustration and worry. Mental health professionals can help.¹⁵ Specific learning disorder often occurs with anxiety, and when it isn’t recognized it is linked to psychological distress and poorer mental health later in life.⁶

Estimates vary with the definition and the cutoff used, and a person can have more than one learning disability, which makes counting hard.^{5, 17} Each figure below says what it measures.

What the numbers mean

• School counts are not prevalence. The IDEA figure counts students who qualified for special education under that category, not everyone with a learning disability.¹⁸
• Combined learning disorders are common. In a representative sample of 1,633 German-speaking third and fourth graders, combined learning disorders were as frequent as single ones. Math problems went with spelling problems more often than with reading problems.¹⁹
• Boys and girls. The same study found no gender difference for reading problems alone. More boys had spelling problems and more girls had arithmetic problems.¹⁹

Many children have trouble with reading, writing or other school tasks at some point. That alone doesn’t mean a learning disability. What stands out is several related signs that don’t go away or get better over time.²⁰

The Learning Disabilities Association of America lists these signs by age. If you see several of them over a period of time, it suggests considering the possibility of a learning disability.¹

Signs linked to each type

• Dyslexia: trouble connecting letters and sounds, spelling and recognizing words; slow reading, silently and aloud; giving up on longer reading; trouble learning new words, songs and rhymes, or a foreign language.²⁰ Even before reading starts, a child may have trouble breaking words into syllables or recognizing rhymes.⁶
• Dysgraphia: very poor handwriting that a child doesn’t outgrow; a tense, awkward pencil grip; a strong dislike of writing; trouble writing ideas down in order; leaving words unfinished or out.²⁰
• Dyscalculia: trouble with basic number ideas such as fractions, number lines, and positive and negative numbers; word problems; making change; following the steps of a problem; describing math processes.²⁰
• Language (DLD): being a late talker; trouble learning new words, following directions and using grammar; in older children, few complex sentences, word-finding trouble and disorganized storytelling and writing.¹⁴

Tick the signs you’ve seen, add real examples, and print a one-page summary for a parent-teacher meeting or an appointment. The Learning Disabilities Association of America suggests writing down your questions and observations before meeting a teacher, and keeping notes and work samples in a folder.¹

This is not a screening test. It gives no score and no result. It only organizes what you’ve seen, in your own words, so a professional can look at it. Nothing you type leaves your browser or is saved.

Prefer paper? The signs-by-age record has the same lists with room for notes.

Not legal advice. This is a short, plain-language map of the federal rules so you know what to ask about. States add their own rules and timelines. For decisions, read the official sources linked here or talk with your state’s Parent Center.

Learning disabilities are often first spotted once a child is in school. Special tests are needed to make a diagnosis.²¹

Through the public school (IDEA)

1. Anyone can start it. A parent or the school can request an initial evaluation. The school needs the parent’s consent before it evaluates.²
2. There’s a clock. The evaluation must be done within 60 days of consent, or within the state’s own timeline if it has one.²
3. Extra help doesn’t have to come first. Many schools use response to intervention (RTI), giving more intensive help in tiers and tracking progress.²¹ Parents still have the right to request a full evaluation at any point, whether or not the child is getting help under RTI.³ If a child isn’t making enough progress, the school must promptly ask the parent for consent to evaluate.²²
4. A team looks at the whole picture. A full evaluation usually includes a medical exam to rule out other causes, a review of development and school performance, family history, and academic and psychological testing. The team may include a psychologist, a special education expert, a speech-language pathologist and a reading specialist.²¹
5. The team decides eligibility. A child must have a qualifying disability and need special education because of it.⁷ If the child qualifies, the school writes an IEP that lists goals, services and the specialists involved.²³

How schools decide it’s a specific learning disability

• Eight areas are looked at: oral expression, listening comprehension, written expression, basic reading skill, reading fluency, reading comprehension, math calculation and math problem solving.²²
• No required IQ gap. States may not require a “severe discrepancy” between IQ and achievement. They must allow a process based on how the child responds to research-based intervention, and may allow other research-based methods.²⁴
• Teaching is checked first. The team must look at data showing the child received appropriate instruction in reading or math and had repeated progress checks shared with the parents.²²

Students who don’t qualify for an IEP may still be protected by Section 504, which requires public school districts to provide a free appropriate public education to each qualified student with a disability.²⁵ This page doesn’t cover how to write an IEP or 504 plan. Your Parent Center can walk you through both.⁴

Private evaluations

Families can also pay for an evaluation by a private psychologist or other qualified specialist. Testing for dyslexia can be done by trained school staff or outside specialists.³ If you share a private evaluation with the school, the school must consider it in its decisions, as long as it meets the district’s criteria.²⁶ If you disagree with the school’s own evaluation, you can ask for an independent educational evaluation at public expense. The school must either provide one or go to a hearing to show its evaluation was appropriate.²⁶

Teens and adults

For people over 17, a documented history of learning problems can stand in for some of the standardized testing in a clinical diagnosis.⁶ College is different from high school. Colleges don’t write IEPs. Students have to tell the college about a disability to get academic adjustments, and an IEP or 504 plan alone is generally not enough documentation. Neither the high school nor the college has to pay for a new evaluation, though a state vocational rehabilitation agency may provide one at no cost to eligible students.²⁷

Bring the question sheet to your first meeting.

There’s no cure for a learning disability, but early help lessens its effects and raises the chance of success in school and later in life.²³ There are no FDA-approved medications for specific learning disorders, though medication may be prescribed for co-occurring conditions such as ADHD or anxiety.⁶

Support comes in two kinds, and most students need both. Instruction builds the weak skill. Accommodations let the student learn and show what they know while that skill catches up.¹¹

Reading: structured literacy

Structured literacy means highly explicit, systematic teaching of foundation skills such as decoding and spelling, plus explicit teaching of vocabulary, comprehension and writing.²⁸ The American Psychiatric Association reports that the most effective treatments for reading impairment are structured, targeted strategies for phonological awareness, decoding, comprehension and fluency.⁶ Many students with dyslexia need lots of structured practice with immediate corrective feedback, often one-on-one or in small groups.^{3, 23}

• Kindergarten to grade 3. A U.S. Department of Education practice guide recommends teaching academic language and vocabulary, awareness of the sounds in speech and how they link to letters, decoding and word analysis, and daily reading of connected text.²⁹
• Grades 4 to 9. For older struggling readers, the companion guide recommends building skills for decoding long, multisyllabic words, purposeful fluency practice, routine comprehension practices, and practice with challenging text.³⁰

Math: explicit, systematic instruction

For elementary students who struggle with math, the practice guide recommends systematic instruction, clear math language, well-chosen concrete and visual representations, the number line, deliberate teaching of word problems, and regular timed activities to build fluency.³¹ Manipulatives and assistive technology can also help students with dyscalculia.⁶

Writing: handwriting, spelling and composing

Students with dysgraphia benefit from explicit teaching of letter formation until it becomes automatic, explicit spelling instruction throughout K–12, and strategies for planning and composing.¹¹ For all elementary writers, the practice guide recommends daily writing time, teaching the writing process, and building fluency in handwriting, spelling, sentence construction, typing and word processing.³²

Accommodations

Accommodation ideas from the NICHD, the International Dyslexia Association and the American Psychiatric Association include:^{23, 3, 6}

• Extra time for tests and assignments
• Tests read aloud or recorded
• Audiobooks
• Text-to-speech
• Word processing or typing instead of handwriting
• Speech-to-text
• A note-taker or provided notes and outlines
• Oral exams or recorded reports
• Drawings of word problems
• Color to mark parts of a problem

Our free accommodations idea list sorts these by reading, writing and math, and adds college examples. In college, the Office for Civil Rights lists adjustments such as priority registration, a reduced course load, note takers, recording devices, extended test time, and screen-reading or voice-recognition software. Colleges don’t have to lower or substantially change essential requirements.²⁷ At work, the Job Accommodation Network gives free, confidential advice on accommodations for learning disabilities.³³

Assistive technology

Students with dyslexia can benefit from audiobooks, text-reading software and word processors.³ Our guide to free assistive technology for reading and writing lists the free text-to-speech, dictation and reading tools already built into common devices.

• Your child’s school. Contact the principal or special education coordinator to ask how to have a child evaluated.²³
• Parent Training and Information Centers. Free help with special education in every state. Find your Parent Center.⁴
• Learning Disabilities Association of America (ldaamerica.org). Information for parents, adults and educators, and state affiliates.
• International Dyslexia Association (dyslexiaida.org). Fact sheets, the 2025 dyslexia definition, and provider directories.
• National Center for Learning Disabilities (ncld.org). Research and policy on learning disabilities.
• Understood (understood.org). A nonprofit with free articles and tools for families, in English and Spanish.
• LD OnLine (ldonline.org). Articles for teachers and parents on learning disabilities and ADHD.
• Speech-language pathologists evaluate and treat language disorders such as DLD.¹⁴
• College students: the campus disability services office. Workers: the Job Accommodation Network.^{27, 33}
• In a crisis, call or text 988 in the U.S. to reach the 988 Suicide & Crisis Lifeline, or chat at 988lifeline.org. In an emergency, call 911.³⁵

For everyday study help, see study skills, focus tools and the assignment countdown planner, which breaks a due date into steps.

Three one-page sheets, free to copy and share under CC BY 4.0. Hand them out at a parent night, add them to a library guide, or bring one to a school meeting.