Free lessons · December 7–11, 2026
Free lessons for the Hour of AI your students will remember
A complete, ready-to-teach hour on what AI is, how it learns and why it can be wrong. Pick your grade band, follow the plan, and finish with a free quiz. Works with or without devices.
Made for the Hour of AI (December 7–11, 2026) or any week. This is an independent AI Understanding lesson, not an official CodeAI / Hour of AI activity.
- Hook: human or machine?5 min
- Unplugged: train the machine15 min
- Interactive: take the quiz15 min
- Spot the mistake10 min
- Talk: three rules for using AI10 min
- Exit ticket and next step5 min
Works with or without devices · Grades 2 to 12 and adults
- 60 minone class period
- 15 minteacher prep
- $0free, no ads
- Optionaldevices
New
New: Ask NOVA (free, no login)
Grades 6–12, with a teacher-led version for grades 3–5.
Students use NOVA, our free AI tutor, to learn how chatbots work, then fact-check its answers against the guides it cites. Grades 6–12, with a teacher-led version for grades 3–5.
Hosting an event? Add it to the official Hour of AI map.
Learning goals
By the end of the hour, students can
Explain in your own words what AI is and is not.
Describe how AI learns from examples, and why poor examples lead to poor results.
Recognize that AI can sound confident and still be wrong, and check an answer against a trusted source.
Name one rule for using AI responsibly in school, work or daily life.
Choose your group
Pick your grade band
Same hour, different emphasis. Each band names the quiz and guide to use in the interactive part.
Elementary
Ages 7 to 10 (grades 2 to 5)
AI is a tool people build. It learns from examples and can make mistakes.
Mostly unplugged, with the digital part done together on one projected screen.
The quiz wording is written for general readers, so read each question aloud and let the class vote. Check your school's rules before students create accounts; a teacher-led session needs none.
Middle school
Ages 11 to 13 (grades 6 to 8)
How AI learns from data, why that can go wrong, and how to check what a chatbot says.
Unplugged game, then pairs on devices.
Pairs work well: one reads, one clicks, then swap after four questions.
High school
Ages 14 to 18 (grades 9 to 12)
Bias, privacy, deepfakes and using AI honestly in schoolwork.
Short unplugged opener, then individual or paired quizzes and a class discussion.
Let students choose among the quizzes. The bias and privacy quizzes are the hardest; start with hallucinations or deepfakes.
Adults and college
College students, staff, library patrons, community groups
How chatbots work, writing better prompts, and responsible use at work and study.
Facilitated session with devices, or self-paced.
ChatGPT and LLMs quizGuide: ChatGPT and large language modelsPrompt engineering quizAI ethics quizAI safety quizWorks as a lunch-and-learn or a library workshop. No coding background is assumed.
The lesson
The 60-minute plan
- 0 to 5 min
Hook: human or machine?
TeacherShow three short messages on the board (one written by a person, one by a chatbot, one by a template). Ask the room to vote which is which, then reveal. Do not worry about getting it right; the point is that it is hard to tell.
StudentsVote with hands, then say what clues they used.
- 5 to 20 min
Unplugged: train the machine
TeacherRun the Train the Machine game below. Students act as the learning system.
StudentsSort example cards, spot patterns, then predict a new card.
- 20 to 35 min
Interactive: take the quiz
TeacherSend students to the quiz for their grade band. Walk around and ask "Why do you think that is the answer?" Use the explanation shown after each question as a talking point.
StudentsWork in pairs. Read the explanation after every answer, even the ones they got right.
- 35 to 45 min
Spot the mistake
TeacherShow one chatbot answer with a mistake you prepared from your own subject (a wrong date, an invented source, a wrong calculation). Ask how you would check it.
StudentsFind the error and name a trusted place to verify it.
- 45 to 55 min
Talk: three rules for using AI
TeacherStudents agree three class rules for using AI well (for example: check important facts, never paste private information, say when AI helped). Write them on the board.
StudentsDiscuss in small groups, then share one rule each.
- 55 to 60 min
Exit ticket and next step
TeacherAsk for one sentence: "AI is ___, but it can be wrong when ___." Show where to go next: more quizzes, the certificate, or joining your class.
StudentsWrite the sentence. Optionally continue at home.
No devices needed
Train the Machine (no devices needed)
You need: Twelve index cards or slips of paper per group, a marker, two labels (for example "Lunch" and "Not lunch").
- Before class, write a short item on each card (for example: sandwich, soup, salad, pencil, shoe, apple, backpack, rice, notebook, pasta, eraser, yogurt). Keep two cards back for the test.
- Groups of three: one "trainer", two "machines". The trainer shows ten labelled cards one at a time, saying only the label. The machines may not ask questions.
- Now the trainer shows a new card (for example: a lunchbox). The machines must predict a label and say how sure they are.
- Discuss: which cards confused you? What would have helped? What if all the training examples had been sandwiches?
- Point out the idea: AI systems learn patterns from examples. If the examples are too few or too similar, the system makes mistakes on new things.
Extension, “Human autocomplete”: Second activity, "Human autocomplete": say "Peanut butter and ..." and have the class call out the next word. Then try "The capital of ...". Explain that a chatbot predicts likely next words from patterns, which is also why it can be confidently wrong.
Lunch
sandwichsoupsaladapplericeNot lunch
pencilshoebackpacknotebookeraserStudent part
The interactive part
Students open a quiz and read the explanation after every answer. Every quiz links to a guide that explains the idea in plain language.
Teachers can create a free class to get a join code, assign quizzes and guides, and see who has finished.
For the teacher
Teacher notes
Prepare in 15 minutes: read the guide for your grade band, take the quiz once yourself, and prepare one chatbot answer with a mistake in it.
Common misconceptions to listen for: "AI knows everything", "AI thinks like a person", "if a chatbot says it, it is true". Gently ask what evidence they have.
Check before the day: that aiunderstanding.org opens on your school network and devices, and that your school permits the activity. The quizzes and guides are free. Saving results and claiming a certificate needs a free account; check your school's rules about student accounts first.
Accessibility: pairs can read aloud for each other; the unplugged game works with pictures instead of words for early readers; allow extra time rather than skipping the explanations.
No devices? Run only the hook, Train the Machine, Spot the mistake and the rules discussion. That is still a full hour.
Keep it honest: you are not expected to be an AI expert. It is fine to say "I do not know, let us look it up".
Create a class to see who finished: teachers can make a free class and share a code. Students join at /join.
Keep going after the hour
A school AI policy template, a parent letter and more lesson links are on the teacher page. Want AI literacy across a whole campus? Become a campus ambassador.
The Hour of AI is a global initiative by Computer Science Education Week [csedweek.org] and the Hour of AI [HourofAI.org] to introduce millions of students to artificial intelligence.