K12 Academics · Learning Differences & Special Education

ADHD

A plain-English guide to ADHD — attention-deficit/hyperactivity disorder. The types, signs, how it's diagnosed, effective supports at school and home, and what families can do.

What
A neurodevelopmental difference
Affects
Attention, impulse control, activity
Types
Inattentive · Hyperactive-impulsive · Combined
Diagnosed by
A doctor or psychologist
Support
Accommodations, strategies, sometimes medication
At school
IEP or 504 Plan
Overview

What it is

ADHD (attention-deficit/hyperactivity disorder) is a common neurodevelopmental difference that affects attention, impulse control, and activity level. It's not about laziness or bad behavior — it's a difference in how the brain regulates focus and self-control. With the right support, students with ADHD thrive, and many bring energy, creativity, and hyperfocus as strengths.

Signs

Signs & characteristics

Evaluation

Evaluation & testing

ADHD is diagnosed by a doctor or psychologist using history, interviews, and behavior rating scales (like the Conners or BASC) completed by parents and teachers — not a single test. A school evaluation can determine eligibility for support (often under “Other Health Impairment” for an IEP, or a 504 Plan).

Supports

Supports & accommodations

For Families

What families can do

Key Terms

Terms to know

FAQ

Frequently asked questions

At a Glance

Key facts

Learn More

Where to learn more

Learn more and find support: