Reading Comprehension · Health Awareness
Autism
A reading lesson about autism — a developmental disorder that affects communication and social interaction — including early signs, functioning levels, and brain differences.
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Subject
Reading Comprehension
Grade Level
Grades 4–8
Format
Lesson + Printable PDF
Access
Full Member
What Is Autism?
Autism is a developmental disorder that often makes it difficult for a person to communicate with and interact with others. A child typically shows signs of autism before three years old, although this is not always the case. Parents often become concerned when their toddler does not start talking on schedule, does not respond to their name, or does not interact with other children.
Toddlers who have autism do not develop speech at the typical rate. They may seem unresponsive even though their hearing tests come back normal. Some children with autism do not make eye contact, do not smile back when smiled at, or seem to prefer to play alone rather than with others. Every child with autism is different, and the combination of signs can vary widely.
Scientists believe autism is caused by abnormalities in the brain. Research also suggests that autism tends to run in families, meaning there is likely a genetic component. However, the exact causes are still being studied. Autism is not caused by parenting style or by vaccines — those links have been thoroughly researched and disproven.
Understanding the Autism Spectrum
There are many different levels of autism, which is why experts often refer to it as a spectrum disorder. People who are low-functioning need support with nearly all daily activities. People who are high-functioning may live independently, hold jobs, and have close relationships — though they may still find some social situations challenging.
Some common behaviors associated with autism include strong preferences for routines, sensitivity to loud sounds or bright lights, intense focus on specific topics or objects, difficulty understanding social cues, and challenges with transitions between activities. These behaviors look different in every individual, and many people with autism develop strategies to manage them over time.
Understanding autism helps classmates, teachers, and families provide better support. People with autism often have remarkable strengths alongside their challenges — many have exceptional memories, detailed observational skills, or deep expertise in subjects they love. Being patient, respectful, and willing to communicate in different ways makes a big difference for everyone.
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