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Presentation11 cardsAbout 3 min to speakBeginnerSchool

Science fair project presentation

Cue cards for explaining your science fair or STEM project to judges: question, hypothesis, variables, method, results, conclusion and what you would try next.

Use this template

Free to use, edit, print and study. No account needed: your set stays on this device.

The cards

  1. 1

    Welcome the judge

    Hi, I am [name]. My project is called [project title].

    I wanted to find out [question in plain words].

  2. 2

    Thirty-second version

    If a judge has very little time, say this:

    I tested whether [independent variable] affects [dependent variable]. I predicted [hypothesis]. I found [main result], which [supports / does not support] my hypothesis. If I did it again, I would [improvement].

  3. 3

    Where the idea came from

    I got the idea when [everyday observation or problem].

    I wondered whether [variable] would affect [outcome].

  4. 4

    Hypothesis

    My hypothesis was: If [I change this], then [this will happen], because [scientific reason].

  5. 5

    Variables

    • Independent variable (what I changed): [variable]
    • Dependent variable (what I measured): [variable, with units]
    • Controlled variables (kept the same): [list two or three]
  6. 6

    Method

    1. [Step one]
    2. [Step two]
    3. [Step three]
    4. I repeated each test [number] times to make the results more reliable.
  7. 7

    Results

    Point to the graph: The [x-axis] shows [variable] and the [y-axis] shows [variable].

    The pattern is [describe the trend]. The biggest difference was [observation].

  8. 8

    Conclusion

    My hypothesis was [supported / not supported / partly supported].

    I think this happened because [scientific explanation].

  9. 9

    Errors and next steps

    • A possible source of error: [measurement, timing, small sample]
    • How I could improve it: [change]
    • If I continued: I would test [new question]
  10. 10

    Likely judge questions

    • Why did you choose this project?
    • What was the hardest part?
    • How did you make it a fair test?
    • What would you change?
    • What did you learn?

    Write a short answer to each on the back of your notes.

  11. 11

    Real-world link

    This matters because [practical use, such as saving water or choosing better materials].

    Thank you. Do you have any questions about my project?

How to use this template

This template helps you explain a science fair or STEM project to judges, teachers or visitors walking past your display board. Science fair judging is often a short conversation of two to five minutes, so the cards follow the scientific method in a compact order: your question and where it came from, hypothesis, variables, method, results, conclusion, errors and next steps, and a real-world link. Judges commonly check whether you understand your variables and can explain your results in your own words, so those cards are central. Keep the cards in your pocket or beside your board, and use your board's graphs as the visual while the cards remind you what to say.

Tips

  • Practise a 30-second version and a three-minute version, because some judges have only a minute while others want the full story.
  • Know your units and your numbers without reading them. Judges often ask how many trials you ran and why.
  • If a result did not match your hypothesis, say so. Explaining an unexpected result well shows real scientific thinking.
  • Point at the board as you talk, so the judge's eyes follow your explanation.
  • Have your logbook or data sheet nearby in case a judge wants to see raw results.
  • Use the correct science words, such as variable, trial, data and fair test, but explain them simply if a judge asks.

Make it fit

  • For younger students, combine variables and method into one card: what I changed, what I measured, what I kept the same.
  • For an engineering or design project, replace the hypothesis card with the problem, design criteria and the prototypes you tested.
  • For a virtual science fair, record the cards as a three-minute video and show the graph full screen during the results card.
  • If your school calls it a STEM expo or science exhibition, the same structure works.
  • For a primary school science fair, a parent or teacher can help fill in the variables card, and the child can explain the results using the graph and their own words.
  • For a group project, decide which member explains which card, and practise passing to each other smoothly.

Updated October 28, 2026

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