An informative speech teaches your audience something specific and accurate without asking them to agree with you or take action. To write one, you narrow a topic to a single angle, state it in a one-sentence thesis, organize two or three main points, support each with sources you name out loud, and rehearse with a timer until it fits your limit.
This guide covers each step, gives you an informative speech outline template timed for 3-, 5- and 7-minute speeches, and walks through a fully sourced informative speech example on caffeine, with a scripted opening and closing.
An informative speech is a talk whose purpose is to increase what your audience understands about a topic, not to change their minds. The open textbook Stand Up, Speak Out: The Practice and Ethics of Public Speaking puts it plainly: in informative speaking, "we avoid expressing opinion." It sets three goals for every informative speech: be accurate, be clear and be interesting.
That doesn't rule out controversial subjects. The same textbook says you can explain a debate as long as you give a fair statement of each side and don't slant the explanation toward one view.
If you've written an informative essay, the research will feel familiar. The difference is that listeners hear each sentence once, at your pace, so a speech needs more previews, signposts and repetition than an essay.
The fastest test is your thesis. If it contains "should" or "must," you have probably drifted into persuasion.
| Feature | Informative speech | Persuasive speech |
|---|---|---|
| Goal | Listeners understand something new | Listeners change a belief or take an action |
| Sample thesis | "Caffeine blocks a tiredness signal in the brain, the amount in a single drink varies widely, and a dose taken six hours before bed can still cost you sleep." | "College students should stop drinking caffeine after noon." |
| Ending | Restates, reviews and closes with a question, quotation or picture of the future | Often closes with an appeal for action or a challenge |
Most informative topics fall into one of five categories that Stand Up, Speak Out uses: objects, people, events, concepts and processes. Its section on types of informative speeches stresses that every one needs narrowing, because "you can't say everything about it in a single speech."
| Type | What it covers | Narrowed specific purpose |
|---|---|---|
| Objects | Things, places, substances, institutions | To inform my audience about what astronomers have learned from the Hubble Space Telescope |
| People | Individuals or roles | To inform my audience about how the first U.S. astronauts to land on the moon were trained |
| Events | One-time or recurring happenings | To describe how the Industrial Revolution affected the lives of ordinary people |
| Concepts | Abstract ideas, theories, hypotheses | To explain the difference between wellness and health |
| Processes | A series of steps, phases or changes | To explain how paper is recycled |
Process speeches that teach listeners to do something are often assigned as demonstration speeches, which our demonstration speech ideas cover. If you still need a subject, browse our informative speech topics, then come back to narrow your pick.
To write an informative speech, work in this order: assignment, topic, thesis, research, structure, explanation plan, draft and rehearsal. Jumping to slides or a word-for-word script before you have a thesis is a reliable way to end up with a speech that runs long and says little.
Before you pick a topic, pull these details from the prompt or rubric:
The time limit matters most because it decides how many main points you can afford.
A workable topic is one you can explain accurately, in your time limit, to this audience, with sources you can actually find. Stand Up, Speak Out warns that a speech about a person shouldn't become a timeline, because if you report every event, "nothing will seem any more important than anything else." Narrow in stages:
Your specific purpose is one sentence that combines the general purpose (to inform), your audience and your topic. Your thesis, also called the central idea, states what listeners will understand by the end, usually by naming your main points in order.
Compare two weak versions. "I'm going to talk about caffeine" is too vague to organize, and "Students should quit energy drinks" is a persuasive claim. Our guide on how to write a thesis statement has more practice.
Use sources you'd be comfortable naming in front of your instructor: government agencies, peer-reviewed studies, university textbooks and established news outlets. For each fact, record the author, credentials, title, date and link so you can cite it aloud.
Check the date on every number. Stand Up, Speak Out notes that being accurate includes making sure your information is current, and the caffeine topic shows why. An archived June 2023 copy of the FDA's caffeine page compared 400 milligrams a day to "about four or five cups of coffee." The current FDA consumer page, updated in August 2024, says 400 milligrams is "about two to three 12-fluid-ounce cups of coffee." News stories with the older comparison are still online, so a speech built on a secondhand source could repeat it.
Plan on two main points for a speech under three minutes and three for a speech of three to ten minutes. That's the guidance in Stand Up, Speak Out's chapter on determining your main ideas, which explains that listeners remember two or three points much more easily than five or ten.
Write each main point as one sentence, keep the points distinct, and give them roughly equal time. Then choose an order. The textbook calls the topical pattern "by far the most common."
| Pattern | Use it when | Example main points |
|---|---|---|
| Topical | Your subject splits into categories | How caffeine works; how much is in drinks; how timing affects sleep |
| Chronological | You're tracing a history or sequence | Winston Churchill's writing before, during and after World War II |
| Spatial | Your subject has physical parts | The urinary system: kidneys and ureters, then the bladder, then the urethra |
| Causal | You're explaining why something happens | Earth's tilted axis (cause); changing sunlight angle and day length through the year (effect) |
| Comparison | Two similar things are easy to confuse | What weather measures; what climate measures; where people mix them up |
The textbook flags problem-cause-solution and psychological patterns as well suited to persuasion, so they're usually a poor fit for an informative assignment. Comparison works for either purpose as long as you don't declare a winner.
Before you draft, mark where your audience is likely to get confused. Stand Up, Speak Out summarizes researcher Katherine Rowan's three sources of confusion, each with a matching explanation.
| Source of confusion | Explanation to use | How it works |
|---|---|---|
| A hard term or concept | Elucidating | Give a typical example, a definition, then examples and non-examples, and let listeners practice telling them apart |
| A process that's hard to picture | Quasi-scientific | Start with the big picture, such as a diagram or an analogy, then connect the parts with words like "leads to" and "because" |
| An idea that's hard to believe | Transformative | Name the audience's everyday theory, show why it seems reasonable and where it falls short, then present the accepted explanation |
The caffeine example uses a transformative explanation in main point I: it grants that caffeine feels like added energy, then shows that it works by blocking a tiredness signal.
Write sentences you can say in one breath. The UNC Writing Center's handout on speeches notes that listeners get only one chance to understand you. It recommends short sentences with subjects and verbs close together, fewer vague pronouns like "it" and "this," and the same key term repeated rather than swapped for synonyms.
Then add the verbal road signs that Stand Up, Speak Out describes:
| Tool | What it does | Example line |
|---|---|---|
| Transition | Closes one main point and opens the next | "Now that you know how caffeine works, let's look at how much is in your cup." |
| Internal preview | Previews what's inside a main point | "I'll start with coffee and tea, then move to energy drinks." |
| Internal summary | Recaps a complicated point | "So caffeine's lift comes from blocking adenosine, the signal that you're tired." |
| Signpost | Marks where you are | "The second thing to know about caffeine is..." |
Cite each source aloud in three moves: set up the idea, give the source with the author's credentials, then explain what it means for your topic. The textbook's chapter on citing sources points out that a citation on your reference page is only half of a correct citation. The example outline below shows what a spoken citation sounds like.
Once your full-sentence outline is done, condense it into key words. Stand Up, Speak Out's section on types of outlines recommends five numbered 4-by-6 notecards, one each for the introduction, the three main points and the conclusion, written on one side only.
Rehearse out loud in front of other people several times over several days, as the textbook recommends, and time every run. Record at least one rehearsal to catch habits you can't feel, such as reading from your cards.
Judge length with a stopwatch, not a word count. The National Center for Voice and Speech puts the average rate of speech for U.S. English speakers at about 150 words per minute, but your pace may differ and pauses add time. Our guide to how many pages a 5-minute speech is can give you a rough draft target.
If you run long, cut a sub-point or example, not your preview or transitions. If you run short, develop your thinnest point instead of adding a new one. For delivering from brief notes, see our guide to the extemporaneous speech.
An informative speech outline has three parts: an introduction that previews your points, a body of two or three supported main points joined by transitions, and a conclusion that reviews them. Copy this template and replace each bracketed label with a full sentence.
Introduction
Body
Conclusion
References in the citation style your instructor requires.
Stand Up, Speak Out's chapter on why introductions matter says an introduction is generally 10 to 15 percent of your speaking time, so no more than 45 seconds in a five-minute speech. The budget below follows that rule, keeps the conclusion about as short as the introduction and gives each main point roughly equal time.
| Section | 3-minute speech | 5-minute speech | 7-minute speech |
|---|---|---|---|
| Introduction | 0:00–0:25 | 0:00–0:45 | 0:00–1:00 |
| Main point I | 0:25–1:30 | 0:45–1:55 | 1:00–2:45 |
| Main point II | 1:30–2:35 | 1:55–3:05 | 2:45–4:30 |
| Main point III | Not used (two points) | 3:05–4:15 | 4:30–6:15 |
| Conclusion | 2:35–3:00 | 4:15–5:00 | 6:15–7:00 |
Write the target times in your outline's margin and check them in every timed rehearsal. If one point keeps running a minute over, fix the outline, not your speaking speed.
This informative speech example is a full-sentence preparation outline for a five-minute classroom speech, built on the template and time budget above. Its facts come from the FDA, a 2013 sleep study and a 2022 research review.
Introduction (0:00–0:45)
Body
Conclusion (4:15–5:00)
References
"Raise your hand if you've had caffeine today. [Pause.] Now keep it up only if you know how many milligrams you had. [Pause.] If your hand just went down, you're in good company; mine would have too before I researched this speech. Caffeine is in the coffee, tea, soda and energy drinks a lot of us bring to class, yet few of us know what it does once we swallow it. To find out, I read the FDA's consumer guidance on caffeine, a sleep study from Henry Ford Hospital and a 2022 research review in the Journal of Sleep Research. Today I'll explain three things: how caffeine works in your brain, how much of it is in the drinks you buy and how the timing of your last cup affects your sleep."
"Let's bring it together. Caffeine keeps you alert by blocking adenosine, the chemical that tells your brain you're tired. How much you get depends heavily on the drink: according to the FDA, a 12-ounce cup of brewed coffee typically holds 113 to 247 milligrams, while the same amount of green tea holds about 37. And in the Henry Ford Hospital study, 400 milligrams taken six hours before bed still cost people more than an hour of sleep. So the next time you check the clock on your afternoon coffee, ask yourself one question: how many hours will separate that cup from your pillow?"
Start an informative speech with an attention-getter tied directly to your topic, then move quickly to your thesis and preview. The UNC Writing Center warns that holding your thesis back for suspense will most likely leave listeners bored or confused.
Of the attention-getters Stand Up, Speak Out lists, a startling fact, a question, a brief anecdote and an expert quotation suit informative speeches best. Keep anecdotes short and true; the textbook calls passing off an invented case as real a betrayal of trust. Our guide on how to write a hook has more openers to adapt.
End by restating your thesis, reviewing your main points and closing with a concluding device. The conclusion deserves the effort: Stand Up, Speak Out describes a 1945 experiment by Ray Ehrensberger that found that information delivered in a speech's conclusion had the highest recall overall.
Pick a closing device that keeps you informative. In the textbook's steps of a conclusion, a table marks a quotation, a question, an inspirational close or a picture of the future as fitting informative speeches, while challenges, appeals for action, advice and proposed solutions are marked for persuasive ones. And restate rather than repeat: UNC's model callback is "I asked earlier why we should care about the rain forest. Now I hope it's clear that..."
Most of these mistakes start in planning, not delivery, so you can fix them before your first rehearsal.
| Mistake | Why it hurts | Fix |
|---|---|---|
| A topic that covers everything | Listeners can't tell which facts matter | Narrow to one feature, event or question |
| A thesis with "should" in it | The speech turns persuasive | Rewrite it around "how," "why" or "what" |
| Five or more main points | Listeners retain two or three much more easily | Merge related points |
| Undefined jargon | Listeners can't translate as you go | Define one key term with an example, then reuse it |
| Sources only on the reference page | Listeners can't judge your evidence | Cite each source aloud with credentials and a date |
| Reading the full-sentence outline | You lose eye contact and sound stiff | Speak from key-word notecards |
| Ending with "So, yeah, that's it" | You waste the part listeners recall best | Plan a restatement, a review and a closing device |
If you'd like a second opinion before you present, a tutor can review your outline or draft and give feedback on your thesis, structure, sources and timing, so the speech you deliver is still your own.
Your instructor or event sets the length, so check the assignment for both a minimum and a maximum. Plan two main points for a speech under three minutes and three for a speech of three to ten minutes. To check your length, time a full read-aloud of your draft. The National Center for Voice and Speech puts the average U.S. English speaking rate at about 150 words per minute, but your own pace may differ.
Most classroom informative speeches need two or three main points. Stand Up, Speak Out recommends two for speeches under three minutes and three for speeches between three and ten minutes, because listeners remember two or three points much more easily than five or more. Give each main point roughly equal time, and support each one with an example, an explanation or a cited fact.
No. An informative speech explains a topic; it doesn't argue for a position. You can cover a controversial subject, but you need to present each side fairly and avoid slanting the explanation toward one view. Reporting what experts concluded, with their names and credentials, is fine. Telling your audience what they should believe or do turns the speech into a persuasive one.
A preparation outline, also called a full-sentence outline, contains every point, transition and citation in complete sentences, and it's usually what you hand in. A speaking outline is the condensed version you use at the podium, made of key words and short phrases. Stand Up, Speak Out suggests five numbered 4-by-6 notecards: one for the introduction, one for each main point and one for the conclusion.
Use three moves: set up the idea, give the source, then explain what it means for your topic. When you give the source, name the author or organization, their credentials, the type of source and the year, as in "a 2013 study in the Journal of Clinical Sleep Medicine." Your written outline should still end with a full reference list in the citation style your instructor requires.
Good topics are narrow enough to explain within your time limit, new to your classmates and backed by sources you can actually find. Objects, people, events, concepts and processes all work. "How caffeine affects sleep" beats "coffee," and "how a bill becomes law" beats "Congress." For more ideas you can narrow the same way, browse our list of informative speech topics.
Open with an attention-getter tied to your topic, such as a question, a startling fact or a brief true story. Then link it to your subject, tell listeners why it matters to them, establish your credibility, state your thesis and preview your main points. Keep the whole introduction to roughly 10 to 15 percent of your speaking time, or no more than about 45 seconds in a five-minute speech.
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