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Informative Speech Topics

120 informative speech topics grouped by subject, each with what to cover, plus how long your speech should run and a free outline template.

Easy informative speech topics

Friendly subjects you can explain clearly with a little reading.

  1. How bees communicate Explain the waggle dance and how bees share where to find food.
  2. Why we dream Cover the main theories about dreaming and what the brain does during sleep.
  3. How recycling works Walk through what happens to a bottle after it leaves the bin.
  4. The history of pizza Trace how pizza grew from a Naples street food into a worldwide favorite.
  5. How rainbows form Explain how sunlight bends and splits into colors inside raindrops.
  6. Why cats purr Cover when cats purr and what scientists think it signals.
  7. How chocolate is made Follow the cacao bean from the farm to the finished bar.
  8. How airplanes stay in the air Explain lift, thrust, drag, and weight in plain terms.
  9. The life cycle of a butterfly Walk through egg, caterpillar, chrysalis, and adult.
  10. How libraries organize books Explain how classification systems help you find any book on the shelf.
  11. Why leaves change color in fall Explain how fading chlorophyll reveals the pigments it hid all summer.
  12. How the Olympic Games began Cover the ancient games in Greece and the modern revival.
  13. How your heart pumps blood Walk through the four chambers and the path blood takes.
  14. How volcanoes erupt Explain magma, pressure, and the different kinds of volcanoes.
  15. Good sleep habits Cover routines, light, and screens, and why a consistent bedtime matters.

Informative speech topics for high school

Subjects that help teens understand money, government, and the world around them.

  1. How the electoral college works Explain electors, how states get them, and why the system exists.
  2. How credit scores work Cover what goes into a score and how everyday choices affect it.
  3. How a bill becomes a law Walk through the steps from idea to signature in Congress.
  4. The causes of the Great Depression Cover the stock market crash, bank failures, and other major causes historians cite.
  5. How vaccines train the immune system Explain antigens, antibodies, and how the body remembers a germ.
  6. How the stock market works Explain shares, buyers and sellers, and why prices move.
  7. What the Supreme Court does Cover how cases reach the court and how justices decide them.
  8. How to read a nutrition label Walk through serving size, calories, and the percent daily value column.
  9. How college financial aid works Explain grants, scholarships, loans, and work-study.
  10. The science of procrastination Cover why people put things off and strategies that help.
  11. How taxes come out of a paycheck Explain gross pay, net pay, and where the difference goes.
  12. How the internet delivers a message Follow a message as data packets travel across networks.
  13. The civil rights movement Cover key events and laws of the 1950s and 1960s.
  14. How peer pressure shapes decisions Explain why groups influence us and how people push back.
  15. How the Constitution is amended Explain how amendments are proposed and then ratified by the states.

Informative speech topics for college

Subjects with enough depth for a college audience and a longer time slot.

  1. How behavioral economics explains everyday choices Cover biases like loss aversion and anchoring with simple examples.
  2. How compound interest builds wealth Explain interest on interest and why starting early matters.
  3. How the placebo effect works Cover what placebos are and why expectations can change how people feel.
  4. How global supply chains work Follow a product from factory to store shelf, including shipping and warehouses.
  5. The psychology of habits Explain cues, routines, and rewards and how habits form.
  6. How memory works Cover short-term and long-term memory and how the brain stores information.
  7. How central banks set interest rates Explain what a central bank does and why rate changes ripple through the economy.
  8. How the scientific method tests ideas Walk through hypothesis, experiment, and peer review.
  9. How copyright protects creative work Explain what copyright covers and the basic idea of fair use.
  10. How languages change over time Cover how words, sounds, and grammar shift across generations.
  11. How election polls work Explain sampling, margins of error, and why polls sometimes miss.
  12. How the brain learns a new skill Explain practice, repetition, and how connections in the brain strengthen.
  13. How inflation works Explain why prices rise over time and how that affects savings.
  14. How negotiation works Cover preparation, interests versus positions, and knowing when to walk away.
  15. The basics of game theory Explain the prisoner's dilemma and how people make strategic choices.

Informative speech topics about science

Big ideas from biology, physics, and earth science, explained in plain words.

  1. How black holes form Explain how massive stars collapse and what an event horizon is.
  2. How CRISPR gene editing works Explain how scientists cut and change DNA at precise spots.
  3. How photosynthesis works Explain how plants turn sunlight, water, and carbon dioxide into food.
  4. How earthquakes happen Cover tectonic plates, faults, and how scientists measure quakes.
  5. How the eye sees color Explain rods, cones, and how the brain builds the colors we see.
  6. How tides work Explain how the moon and sun pull on Earth's oceans.
  7. What DNA does Explain genes, proteins, and how traits pass from parents to children.
  8. How antibiotics fight bacteria Explain how they work and why they don't work on viruses.
  9. How octopuses camouflage themselves Cover the skin cells that let them change color and texture.
  10. How the water cycle works Walk through evaporation, condensation, precipitation, and collection.
  11. Why the sky is blue Explain how air scatters sunlight and why blue light scatters most.
  12. How hurricanes form Cover warm ocean water, rising air, and how storms gain strength.
  13. How fossils form Explain how remains turn to stone and what fossils tell scientists.
  14. How magnets work Explain magnetic fields, poles, and why only some materials are magnetic.
  15. How sound travels Explain vibrations, waves, and why sound moves faster through water than air.

Informative speech topics about history

Moments and movements that shaped the world, with plenty to explain.

  1. The building of the Great Pyramid of Giza Cover what historians know about who built it and how.
  2. How the printing press changed the world Explain how movable type spread ideas faster across Europe.
  3. The Silk Road Explain the trade routes linking China and the Mediterranean and what moved along them.
  4. The race to the moon Cover the space race and the Apollo 11 landing in 1969.
  5. The fall of the Western Roman Empire Cover the major causes historians still debate.
  6. The Underground Railroad Explain how the secret network helped enslaved people escape to freedom.
  7. How the Industrial Revolution changed work Cover factories, steam power, and the move from farms to cities.
  8. The Renaissance Explain the revival of art, science, and learning that began in Italy.
  9. The Berlin Wall Cover why it went up, life on both sides, and how it came down in 1989.
  10. Women's right to vote in the U.S. Cover the suffrage movement and the 19th Amendment.
  11. The Black Death Explain how the plague spread through Europe and how it changed society.
  12. Ancient Egyptian hieroglyphs Explain how the writing worked and how the Rosetta Stone helped scholars read it.
  13. The invention of the airplane Cover the first powered flights and how aviation grew from there.
  14. The Great Wall of China Explain why it was built and how it grew over centuries.
  15. The Magna Carta Explain what it was and why it shaped later ideas about law and rights.

Informative speech topics about technology

How the tech in your pocket and your classroom actually works.

  1. How artificial intelligence learns Explain training data, patterns, and how models make predictions.
  2. How GPS finds your location Explain satellites, signals, and how your device works out where it is.
  3. How touchscreens work Explain how a screen senses the touch of a finger.
  4. How Wi-Fi works Explain radio waves, routers, and how devices connect.
  5. How encryption keeps messages private Explain keys, scrambling, and why only the right person can read a message.
  6. How 3D printing works Explain how printers build objects one layer at a time.
  7. How cloud storage works Explain data centers and how your files live on servers far away.
  8. How solar panels make electricity Explain how sunlight frees electrons to create an electric current.
  9. How search engines rank results Explain crawling, indexing, and why some pages show up first.
  10. How video games are made Cover design, art, programming, testing, and how teams work together.
  11. How phishing scams work Explain how scammers trick people and the warning signs to watch for.
  12. The history of the computer Trace computers from room-sized machines to the phone in your pocket.
  13. How electric cars work Explain batteries, motors, and charging.
  14. How barcodes and QR codes work Explain how patterns store information and how scanners read them.
  15. How voice assistants understand speech Explain how speech becomes text and text becomes a response.

Informative speech topics about health

How the body works and what keeps it running well.

  1. How sleep affects memory Explain what the brain does with new information while you sleep.
  2. How stress affects the body Cover the fight-or-flight response and what long-term stress does.
  3. How caffeine works Explain how caffeine blocks the signals that make you feel tired.
  4. The benefits of regular exercise Cover the heart, muscles, mood, and sleep.
  5. The gut microbiome Explain the bacteria in your digestive system and why they matter.
  6. How allergies work Explain how the immune system overreacts to harmless things like pollen.
  7. Why hydration matters Explain what water does in the body and the signs of dehydration.
  8. How the body uses protein, carbs, and fat Explain what each nutrient does and where it comes from.
  9. How screens affect sleep Explain light at night, late scrolling, and the body clock.
  10. How loud noise damages hearing Explain how sound can harm the tiny hair cells in the inner ear.
  11. The basics of mental health Cover what mental health is, common challenges, and where to find support.
  12. How posture affects your body Explain how sitting and standing habits affect your back and neck.
  13. How sunscreen protects skin Explain UV rays, SPF, and why reapplying matters.
  14. How CPR works Explain how chest compressions keep blood moving until help arrives.
  15. How the body heals a cut Walk through clotting, swelling, and new tissue growth.

Informative speech topics about culture

Traditions, music, food, and language from around the world.

  1. New year traditions around the world Compare celebrations from several countries and what they share.
  2. The history of hip-hop Cover its roots in the Bronx in the 1970s and how it spread worldwide.
  3. The history of tea Trace tea from China to the tea traditions of many cultures.
  4. Why every culture tells folk tales Explain how stories pass lessons and values across generations.
  5. How emojis became a language Explain how small pictures took on shared meaning in everyday messages.
  6. The origins of jazz Cover how jazz grew in New Orleans from blues, ragtime, and other roots.
  7. How street food reflects a city Explain how local ingredients and history show up in what people sell on the street.
  8. Day of the Dead traditions Explain the Mexican holiday's customs and what they honor.
  9. How sign languages work Explain that sign languages have their own grammar and differ from country to country.
  10. The history of comic books Trace comics from newspaper strips to graphic novels.
  11. How music affects mood Explain how rhythm, tempo, and memory shape how a song makes us feel.
  12. What colors mean in different cultures Show how the same color can carry different meanings around the world.
  13. Why fashion trends come back Explain the cycle that brings old styles back into style.
  14. The history of the movies Trace film from silent pictures to sound, color, and streaming.
  15. How English borrows words Explain how English picked up words from many other languages.

How to structure an informative speech

A five-minute informative speech runs about 700 words at 140 words per minute. Spend most of them on your main points.

Hook
Open with a surprising fact, a short story, or a question your audience can't answer yet. Give them a reason to listen.70 words
Thesis
Say in one sentence what you'll explain. Then preview your main points so the audience knows where you're headed.70 words
Main points
Cover two or three main points, about 140 words each. Use examples and comparisons to make each one stick.420 words
Summary
Recap your main points in a few quick sentences. Repetition is how people remember.70 words
Close
End with a line that ties back to your hook. Leave the audience with one thing they'll repeat to someone else.70 words

That adds up to 700 words, about 5 minutes at 140 words per minute. Time your speech once it's written.

How long should an informative speech be?

Know your word count before you write a single line. This table matches common speech lengths to the words you'll need.

Word counts at 130 to 150 words per minute, a typical classroom speaking pace.
Speech lengthWords to write
2 minutes260 to 300 words
3 minutes390 to 450 words
5 minutes650 to 750 words
7 minutes910 to 1,050 words
10 minutes1,300 to 1,500 words

Not sure how long yours runs? Time your speech with the free words to minutes calculator.

Informative speech FAQ

What is an informative speech?

An informative speech teaches the audience about a subject without asking them to take a side. Your job is to explain clearly, organize well, and make the facts easy to remember. Think teacher, not lawyer.

How do I choose an informative speech topic?

Pick a subject you're curious about, because curiosity is contagious. Make sure you can find reliable sources and explain it clearly within your time limit. A narrow topic explained well beats a huge topic skimmed.

How long is an informative speech?

Class assignments often run 3 to 7 minutes, so check your rubric first. Most people speak at about 130 to 150 words per minute, which puts a 5-minute speech at roughly 650 to 750 words. Practice out loud with a timer to know for sure.

What's the difference between an informative and a persuasive speech?

An informative speech explains a subject and lets the audience draw their own conclusions. A persuasive speech takes a side and asks the audience to agree or act. If you'd rather argue, browse our persuasive speech topics.

Persuasive speech topics

150 topics, each with the angle to argue.

Speech topics

Every topic list in one place.

Speech outline template

A timed outline for persuasive and informative speeches.

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