100 Informative Speech Topics You Can Research This Week

A good informative speech topic is one process, object, event, or idea that you can explain in your time slot without telling the audience what to do. The strongest topics answer a "how" or "why" question, such as how noise-cancelling headphones cancel sound.

This page lists 250+ informative speech topics in 13 groups: 10 good starter topics, then easy, fun, college, high school, 5-minute, and seven subject lists. It also gives you a 4-step way to pick a topic and an outline template you can copy.

Tap Create next to a topic to start a deck on it in GenPPT.

Good informative speech topics

A good topic passes three tests: it fits your time slot, you can show it in one diagram, and you can name a primary source for it. These 10 topics pass all three.

Start here if you are short on time. The longer lists by level, time, and subject follow.

What is an informative speech?

An informative speech teaches the audience about one subject. The goal is that they understand it and remember it.

An informative speech is not a persuasive speech in disguise. You are not closing a sale. You are making one process, object, or event understandable.

Most public speaking courses sort informative speeches into four types. Your topic decides the type, and the type decides how you organize the talk.

Type	What you explain	Example topic
Object	A thing, person, place, or animal	What microplastics are and where they show up
Process	How something works or is done	How city recycling actually gets sorted
Event	Something that happened or happens	How time zones were a railroad problem
Concept	An idea, a theory, or a term	What "herd immunity" does and does not mean

Process topics are the easiest to plan. The steps give you the structure.

Informative vs persuasive speech

	Informative	Persuasive
Goal	The audience understands	The audience agrees or acts
Thesis	"Here is how X works"	"We should do X"
Evidence	Facts, steps, examples	Facts plus answers to the other side
Test	No "should" in the thesis	A reasonable person can disagree

How to pick

Ask: can I teach this without arguing that people should do something? If you keep slipping into "should," it is persuasive. Try debate topics instead.

Use these four steps:

Read the assignment. Write down the time limit, the number of sources, and the rules for visual aids.
List what you already know. Your job, your major, a sport, a hobby, your city. You explain a subject better when you have used it.
Turn the subject into a question. Start with "how," "why," or "what." "Recycling" becomes "How city recycling actually gets sorted."
Run the tests below. If the topic fails two of them, pick another one.

Good tests:

I can demo it or show one diagram
I can name a misconception in one sentence
I can find a number from a real agency or paper

Narrow a broad subject

A broad subject is not a topic. Pick a slice: how it works, how it changed, or what a beginner gets wrong.

Broad subject	Topic that fits 5 to 6 minutes
Climate change	How a heat pump moves heat
Vaccines	How mRNA vaccines teach cells
Money	What a credit score is made of
Social media	How social media algorithms pick your feed
The Olympics	How Olympic judges score gymnastics

Match the topic to the clock

Plan about one slide per minute. A shorter slot needs a smaller topic, not faster speech.

Time slot	Main points	Slides	Topic size
2 minutes	1	0 to 3	One fact or one step
5 minutes	2 to 3	5 to 6	One process, start to finish
10 minutes	3	8 to 10	A process plus its history or a comparison

Already have a topic? Start the deck now and come back for the outline.

Turn your topic into a deck

Easy informative speech topics

These topics are easy because your audience already uses the thing you explain. You can research each one in an evening, and each has an obvious diagram.

Fun informative speech topics

A fun topic takes a small, odd question and answers it with real sources. The humor comes from the facts. The speech still has to teach something.

Informative speech topics for college students

College instructors look for a narrow thesis and cited sources. These topics come from campus life, money, and research, so you have experience to add to the facts.

If the assignment is a class presentation and not a speech, see unique college presentation topics.

Informative speech topics for high school students

These topics connect to classes you take and things you do each day. Each one has a clear answer you can find in a textbook or on an agency website.

5-minute informative speech topics

A 5-minute slot holds two or three main points. These topics have one mechanism to explain, so they fit without a rush.

For a shorter slot, use these 2-minute speech topics. For a longer one, use these 10-minute presentation topics.

School and everyday

Use these for a general class audience. No background knowledge is necessary.

Science and health

Each of these has a primary source: an agency page, a journal paper, or a textbook chapter. Start there, not with a blog.

Technology informative speech topics

Technology topics work when you explain one mechanism. Skip "the future of AI." Explain how one thing works today.

Psychology informative speech topics

Psychology topics are popular because the audience can test them on themselves. Cite the study, not a summary of the study.

Work, money, and civic

Use these for a business class, a team meeting, or a civics assignment. Many of them change by state, so use your own state's rules as the example.

Arts, sports, and entertainment topics

Rules, scores, and money make good informative speeches. The audience watches the result every week and does not know how it is decided.

6-slide outline

Six-step informative talk on a classroom projector

Hook with a wrong common belief
Definition in one sentence
Chunk A (how it works)
Chunk B (who is involved / a number)
Chunk C (what people mix up)
Recap in three bullets they can photograph

Put one idea on each slide. The table shows what the audience sees while you speak.

Slide	What you say	What you show
1. Hook	The belief, then "that is wrong"	One sentence or one photo
2. Definition	The term in one sentence	The term and the definition
3. Chunk A	The steps, in order	One diagram
4. Chunk B	One number and where it comes from	The number, large, with a source
5. Chunk C	The mix-up and the correction	Two columns: myth and fact
6. Recap	The three points again	Three short bullets

Time it with how many slides per minute. For a short slot, see 2-minute speech topics. For 10 minutes, 10-minute presentation topics.

Informative speech outline template

Many instructors ask for a written outline before you speak. Copy this template and fill in each line. One full sentence per line is sufficient.

text

Title:
General purpose: To inform
Specific purpose: To inform my audience about ...
Thesis (central idea): ...

INTRODUCTION
1. Attention getter (a wrong common belief, a question, a short story):
2. Why this matters to this audience:
3. Why you can speak on it (experience or research):
4. Thesis and preview of the three main points:

BODY
I. Main point 1 (how it works):
   A. Fact, with source:
   B. Example:
   Transition to point 2:
II. Main point 2 (who is involved, or a number):
   A. Fact, with source:
   B. Example:
   Transition to point 3:
III. Main point 3 (what people mix up):
   A. Fact, with source:
   B. Example:

CONCLUSION
1. Signal the end ("To recap"):
2. Restate the thesis and the three main points:
3. Closing line that returns to the attention getter:

REFERENCES
1. Primary source:
2. Explainer:
3. Explainer:

Pick an order for the main points

The order of your main points depends on the type of topic.

Pattern	Use it for	Example topic
Chronological	Processes, histories, how-to talks	How a PCR test amplifies DNA
Spatial	Places and things with parts	How a wind farm gets connected to the grid
Topical	Types, parts, or categories	What an ETF holds
Cause and effect	Why something happens	Why your phone battery dies in the cold

When the outline is done, you can paste it into GenPPT or upload it as a Word document or PDF. GenPPT researches the topic, drafts a slide outline that you approve, and designs the slides. You then edit slides in chat and export to PowerPoint (.pptx) or PDF.

The slides are full-slide designs, so charts do not link to Excel. Check each number on the slides against your sources before you present.

Research path

For any topic: one primary source (agency, paper, statute), two explainers, one diagram you can redraw. If you cannot name the primary source, pick another topic.

A primary source is the organization or document that the facts come from:

A government agency page, such as the FDA, NOAA, or the Bureau of Labor Statistics
A peer-reviewed paper
A statute, a standard, or an official rulebook
The organization's own document, such as an annual report or a manual

A 5-day plan

Day	Task	Done when
1	Pick the topic. Find the primary source	You can say the thesis in one sentence
2	Read two explainers. Sketch one diagram	You can explain it to a friend without notes
3	Fill in the outline template	Each main point has one fact with a source
4	Build the slides	One slide per chunk, sources in the notes
5	Rehearse out loud with a timer, two times	You finish a little before the time limit

Worked example: pulse oximeters and skin tone

Hook: "The number on the fingertip clip is an estimate. For some patients it is a less accurate one."
Definition: a pulse oximeter uses light to estimate the oxygen level in your blood without a blood sample.
Chunk A: how the device compares red and infrared light absorption to estimate SpO2.
Chunk B: the evidence. A 2020 letter in the New England Journal of Medicine compared pulse oximeter readings with blood tests: Black patients had nearly three times the frequency of undetected low oxygen as White patients. The FDA's February 2021 safety communication lists skin pigmentation, poor circulation, and nail polish among the things that affect accuracy. In January 2025 the FDA published draft guidance that asks manufacturers to test devices on more people across a range of skin tones.
Chunk C: people mix this up with "the device is racist on purpose." The issue the FDA guidance addresses is testing: how many people are in the studies, and what range of skin tones they have.
Recap: the reading is an estimate, it can read too high for some patients, and a blood test (arterial blood gas) gives the measured value. Do not rely on the fingertip number alone.

Sources to start: the FDA page on pulse oximeters and one peer-reviewed accuracy study, such as the 2020 NEJM letter. Put the URLs in speaker notes.

Create this pulse oximeter deck

History and culture (slice titles)

History topics fail when the title is "the history of X." Each of these is one slice with a start and an end.

Your assignment	Use this list
Argue one side of a question	Debate topics
Share one idea with a personal story	TED talk topics
Speak for two minutes	2-minute speech topics
Present for ten minutes with slides	10-minute presentation topics
Present in a college class	Unique college presentation topics

FAQ

What is a good informative speech topic?

A good informative speech topic is a process, a comparison, or a misconception you can teach without a "should." It fits your time slot, it has one primary source, and you can show it in one diagram. "How QR codes store data" is a topic, and "technology" is a subject. Start with these 10 good informative speech topics.

What are easy informative speech topics?

Easy topics explain things your audience already uses: QR codes, why planes dim lights, how a credit score is built, how recycling is sorted in your city. You can research each one in an evening. See the full list of easy informative speech topics.

What are good informative speech topics for college students?

Pick a slice from your major, your job, or campus life that you can diagram in one slide. Examples: how the FAFSA calculates your Student Aid Index, how peer review works at a journal, and how AI text detectors work. Avoid "everything about climate."

What are fun informative speech topics?

Fun topics answer a small, odd question with real sources. Examples: why flamingos are pink, how bubble wrap started as wallpaper, and why golf balls have dimples. Keep every fact true. The surprise does the work that a joke does.

What are the 4 types of informative speeches?

Many public speaking textbooks list four types by subject: objects, processes, events, and concepts. Other textbooks sort by purpose: definitional, descriptive, explanatory, and demonstration speeches. Use the set your instructor uses.

What is the difference between an informative and a persuasive speech?

An informative speech helps the audience understand a subject. A persuasive speech asks the audience to agree or to act. If you keep saying people should change a law, it is a debate topic.

How do I research an informative speech in a week?

Primary source + two explainers + one diagram. Stop collecting blogs. Then follow the 5-day plan: source, explainers, outline, slides, rehearsal.

Turn your topic into slides

Pick a topic from the lists, or type your own. GenPPT researches it, drafts an outline for you to approve, and designs the slides in about 2 to 3 minutes after you approve the outline.

GenPPT has no free plan. The trial costs $1 for 3 days of full access, and a card is necessary. After the trial, the price is $25 per month or $99 per year for 20 decks per month, with PowerPoint and PDF export without a watermark.

Keep diagrams sparse. One process graphic beats five stock photos of science.

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