Research

Every number on this site, with its source.

We cite public data and label our own educator feedback as our own. If a figure comes from our cohort, we report the sample size and the denominator.

Sources

Public data we rely on.

CDC — mental, behavioral, and developmental disorders

Prevalence rose from 25.3% in 2016 to 27.7%.

ADHD prevalence

2022 NSCH analysis: 11.4% of U.S. children ages 3–17 had ever received an ADHD diagnosis.

Anxiety, depression, and behavior trends

2016–2022: anxiety 6.9% → 10.6%, depression 3.1% → 4.6%, behavioral/conduct 7.2% → 7.5%.

Learning disability trend

CDC/NSCH research reports estimates of 7.9% and 9.2% across the study period.

Yale Center for Dyslexia & Creativity

Dyslexia affects about 20% of the population and represents 80–90% of learning disabilities.

U.S. Department of Education — chronic absenteeism

About 31% in 2021–22 and 28% in 2022–23.

NCES — students with disabilities

Among IDEA students ages 14–21 exiting school in 2021–22, dropout was highest for emotional disturbances at 30%.

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