It is a conversation, not a recital
At ISEF, judging happens face to face. Judges are working scientists and engineers, and they are far less interested in a memorized speech than in how you think. Expect questions, interruptions, and follow-ups. That is the judges doing their job.
The four things judges weigh
Across categories, strong projects tend to share four qualities:
- An original, well-posed question. Did you ask something genuinely interesting, and is it truly yours?
- Sound method. Were your experiments controlled, repeated, and honestly analyzed?
- Real understanding. Do you grasp why your results matter and what their limits are?
- Clear communication. Can you explain complex work simply and confidently?
How to prepare for the interview
Practice explaining your project in three lengths: thirty seconds, two minutes, and ten minutes. Rehearse with people who are not experts in your field. If they understand you, judges will too. Prepare honest answers to what you would do next and what went wrong.
Honesty wins
Judges respect students who can admit the limits of their work and describe an experiment that failed and what it taught them. Trying to hide a weakness almost always backfires. Confidence built on honesty is the strongest impression you can leave.
This is an independent guide to the Regeneron International Science and Engineering Fair, operated by Hanlin Education for China-based international-school students. We are not affiliated with, endorsed by, or sponsored by the Society for Science or Regeneron ISEF. Categories, eligibility, dates and rules change by year — always confirm the current details on the official Society for Science / ISEF site. Confirmed errors are corrected within 7 working days.