Quick answer: Sex education matters because accurate, age-appropriate information helps people protect their health, build respectful relationships and recognize abuse. Three decades of research find that comprehensive programs are linked to healthier outcomes, while abstinence-only programs are not (Goldfarb & Lieberman, 2021; Santelli et al., 2017). Most U.S. parents support it in middle and high school (Kantor & Levitz, 2017).
If you’ve ever wondered whether sex education really makes a difference, you’re not alone. It’s one of the most debated subjects in schools and one of the most studied. This article gathers the strongest evidence into one five-minute read, so you can decide for yourself and share it with others.
What “sex education” actually means
The phrase can sound narrower than it is. Comprehensive sex education is a planned, age-appropriate curriculum that covers how bodies grow and change, consent and boundaries, healthy relationships, preventing infections and unplanned pregnancy, and where to find trusted care. Guttmacher describes comprehensive education as medically accurate, age-appropriate, inclusive and culturally responsive (Guttmacher Institute).
At Dr Sex Ed, that looks like different things for different people:
- Grades 6–8: puberty, body changes, respect and personal boundaries, in our Growing Up, Speaking Up program.
- Grades 9–12: health, rights, relationships and decision-making in Know Your Body, Know Your Rights.
- Parents and caregivers: practical scripts in our Talking with Kids workshop.
- Adults: clear answers at every life stage, including midlife and menopause.
See all of them on our programs page.
What the research says
Comprehensive programs show broad benefits
The most extensive recent review looked at three decades of studies on school-based programs. Goldfarb and Lieberman’s systematic review included 80 articles that met their criteria. They found evidence that comprehensive sex education supports healthy relationships, the prevention of dating and intimate partner violence, the prevention of child sexual abuse, social and emotional learning, and media literacy, in addition to its well-known health benefits. They also found substantial support for starting in elementary school, building skills over several grades, and including LGBTQ+ students (Goldfarb & Lieberman, 2021).
It does not encourage risky behavior
A common worry is that teaching young people about health will lead to earlier sexual activity. The World Health Organization says the evidence points the other way. High-quality comprehensive sexuality education is not associated with more sexual activity or risk-taking, and it is linked to later initiation, fewer partners and more consistent protection (WHO).
Abstinence-only programs fall short
The Society for Adolescent Health and Medicine reviewed U.S. abstinence-only-until-marriage programs and concluded that they are not effective in delaying initiation or changing other risk behaviors. They can also leave out or stigmatize many young people, including LGBTQ+ youth and survivors of assault (Santelli et al., 2017). Abstinence can be a healthy personal choice. The problem is programs that only teach abstinence and withhold everything else.
Why it matters in schools
School is where most young people get consistent, structured health education, but access varies widely. According to Guttmacher’s state policy tracker, 41 states and Washington, D.C. require sex education, HIV education or both, yet only 26 states require that it be medically accurate (Guttmacher Institute). A 2025 legal analysis in the American Journal of Public Health found that while 42 states mandate sex education in at least one content area, only 19 require medically accurate content for any topic, and 34 allow parents to opt their children out (AJPH, 2025).
In practice, a student’s zip code can decide whether they learn about consent, healthy relationships, or how to find care. That is the gap free, high-quality resources can help close.
The health stakes are real
The need doesn’t stop at graduation.
- STIs remain common. The CDC reported more than 2.2 million cases of chlamydia, gonorrhea and syphilis in 2024. That was a 9% drop from 2023, but still 13% higher than a decade earlier. Congenital syphilis rose for the 12th year in a row (CDC, 2024 provisional data).
- Protective habits have slipped. Among high school students who were sexually active, only about half used a condom the last time, down from 59% in 2013. HIV testing fell from 13% in 2013 to 7% in 2023, and STI testing fell from 9% in 2019 to 6% in 2023 (CDC YRBS 2013–2023).
- Violence prevention is urgent. In 2023, 11% of high school students reported experiencing sexual violence in the past year (CDC YRBS).
Education is one of the few tools that addresses all of these at once, by teaching facts, skills, and where to go for help.
Parents overwhelmingly agree
Sex education is often framed as divisive, but parents are far more united than headlines suggest. In a nationally representative survey of 1,633 parents, 93.5% said sex education in middle school was important and 96% said the same for high school. Support was high among both Democrats and Republicans (Kantor & Levitz, 2017).
Parents also want help. Many tell us they don’t know where to start. That’s why we built free, practical guides such as What to say when your kid asks about sex and our free resources library.
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What good sex education looks like
Strong programs share a few traits, drawn from the research above:
- Evidence-based: built on current science and updated as it changes.
- Age-appropriate: body safety and respect for younger children; puberty in late elementary and middle school; relationships, consent and health care in high school and beyond.
- Inclusive: every student sees themselves in the lessons. Read more in Sex Ed for Everyone.
- Skills-based: students practice communication, refusal skills and how to find care, not just memorize facts.
- Supports families: parents are partners, with tools to continue the conversation at home.
Where Dr Sex Ed fits
Dr Sex Ed is a nonprofit built on one belief: information is not harmful. Silence is. We provide:
- Classroom programs for grades 6–12, aligned with national standards.
- Training for educators and counselors through our Educator & Counselor Training Institute.
- Parent workshops and free downloadable guides.
- Dr Ed, a free AI health educator for ages 13+ (under 13 with a parent’s consent) that answers questions privately, any time, with no sign-up, at drsexed.ai. Dr Ed is an educator, not a doctor, and points people to professional care when they need it.
Learn more about our mission or browse our blog.
How you can help
- Give: a one-time or monthly gift keeps our programs and Dr Ed free. Donate here.
- Share: send this article to a parent, teacher or school board member.
- Bring a program to your community: contact us.
Frequently asked questions
Why is sex education important?
It gives people accurate information and practical skills to protect their health, build respectful relationships and recognize abuse. Reviews of three decades of research link comprehensive programs to healthier relationships, violence prevention and better health outcomes.
Why is sex education important in schools?
School is where most young people receive consistent, structured health instruction. Requirements vary widely by state: 41 states and D.C. require sex or HIV education, but only 26 require it to be medically accurate. Quality school programs help close that gap.
Does sex education make teens more likely to become sexually active?
No. The World Health Organization reports that high-quality comprehensive sexuality education is not linked to more sexual activity. It is associated with later initiation and more consistent protection.
What age should sex education start?
Research supports starting early with age-appropriate topics, such as body safety and respect for younger children, then building toward puberty, relationships and health care over time.
Do parents support sex education in schools?
Yes. In a nationally representative survey, 93.5% of parents said sex education in middle school was important and 96% said it was important in high school, across political parties.
How can I support sex education?
You can donate to a sex education nonprofit like Dr Sex Ed, share accurate resources, and ask your school district what its curriculum covers.
Sources
- Goldfarb ES, Lieberman LD. Three Decades of Research: The Case for Comprehensive Sex Education. J Adolesc Health. 2021;68(1):13–27. https://doi.org/10.1016/j.jadohealth.2020.07.036
- Santelli JS, et al. Abstinence-Only-Until-Marriage: An Updated Review of U.S. Policies and Programs and Their Impact. J Adolesc Health. 2017. https://doi.org/10.1016/j.jadohealth.2017.05.031
- World Health Organization. Comprehensive sexuality education (Q&A). https://www.who.int/news-room/questions-and-answers/item/comprehensive-sexuality-education
- Guttmacher Institute. Sex and HIV Education (state policy). https://www.guttmacher.org/state-policy/explore/sex-and-hiv-education
- Nelson, Gray, Haiken, Underhill, et al. The State of Sexual Education: State Laws and Regulations Mandating Sexual Education in the United States. Am J Public Health. 2025. https://doi.org/10.2105/AJPH.2025.308199
- CDC. Sexually Transmitted Infections Surveillance, 2024 (Provisional). https://www.cdc.gov/sti-statistics/annual/index.html
- CDC. Youth Risk Behavior Survey Data Summary & Trends Report, 2013–2023. https://www.cdc.gov/yrbs/dstr/pdf/YRBS-2023-Data-Summary-Trend-Report.pdf
- Kantor L, Levitz N. Parents’ views on sex education in schools: How much do Democrats and Republicans agree? PLOS ONE. 2017. https://doi.org/10.1371/journal.pone.0180250