Are you passionate about pushing the boundaries of knowledge? For New Jersey high school students, regional science fairs are the proving ground: a chance to conduct real research, present it to professional judges, and potentially qualify for the Regeneron International Science and Engineering Fair (ISEF), the world's largest pre-college science competition.
New Jersey's path to ISEF runs through several regional fairs, and which one you enter depends entirely on where you live or go to school. Here's how the map breaks down, followed by a closer look at the Mercer Science and Engineering Fair and what it takes to win any of them.
Which New Jersey Science Fair Should You Enter?
ISEF rules allow each student to compete in only one affiliated regional fair, and each New Jersey fair serves a defined territory:
Fair | Who It Serves |
|---|---|
Terra North Jersey STEM Fair | Bergen, Essex, Morris, Passaic, Sussex, Union, and Warren counties |
Terra Central Jersey STEM Fair | Hunterdon, Middlesex, and Somerset counties |
Mercer Science and Engineering Fair | Mercer County |
Hudson County STEM Showcase | Hudson County |
BCA Research Expo | Students at Bergen County Academies (all programs) |
A few boundary rules worth knowing. Students at Bergen County Academies enter the BCA Research Expo rather than their county fair. Counties south of Mercer are served by the Delaware Valley Science Fairs, the Philadelphia-region ISEF affiliate. And because the Mercer fair accepts individual projects only, Mercer County students with team projects enter the Terra fair instead under a standing agreement between the fairs.
The Mercer Science and Engineering Fair
If you're a Mercer County resident, the Mercer Science and Engineering Fair (MSEF) is your route to ISEF. Run by the Mercer Science and Engineering Club, the fair sends its top qualifiers to represent the county on the international stage. Registration typically opens in late summer and runs into early spring, with the fair held in the spring; check mercersec.org for the current cycle's exact dates before planning your timeline.
MSEF organizes senior division projects into categories spanning the full range of STEM: animal science, behavioral and social science, biochemistry and biomedical sciences, chemistry and materials, energy, environmental science and engineering, general engineering including robotics, mathematics, physics and astronomy, software and embedded systems, and plant science. Categories are updated periodically, so confirm the current list against the official guidelines when you register, and choose the category that genuinely fits your project, since you'll be judged against its standards.
How to Win Your Regional Fair
The advice below applies to Mercer and every other fair on this list, because New Jersey's regional fairs judge on fundamentally similar criteria: scientific rigor, originality, and communication.
Prepare Early
The strongest projects take months of experimentation, refinement, and honest failure. Beginning in the summer or early fall gives you room to iterate before deadlines compress everything.
Choose an Original, Relevant Topic
Pick a question that sparks your curiosity and hasn't been done to death. Browse recent winners from your fair for calibration, then carve your own path. Grounding your project in a real scientific or engineering challenge, whether renewable energy, water purification, or a local environmental problem, makes it more compelling to judges, as it has impact.
Scope Your Question Carefully
Ambition is good; an incomplete experiment is not. Scope your project to the time and resources you actually have.
Master the Scientific Process
For science projects, that means the scientific method executed rigorously: a focused question, genuine background research, literature review, a testable hypothesis, a well-designed experiment with accurate data collection, honest analysis, and conclusions that follow from the evidence.
For engineering projects, it's the design process: define the problem, research and brainstorm solutions, prototype, test and evaluate, improve, and document everything. Judges consistently reward students who understand why each step matters over students with flashier results and a shallower process.
Understand the Judging Criteria
Every fair publishes its criteria. Read them before you finalize your project, and shape your presentation to address them directly.
Present With Confidence
A clear, engaging display with high-quality visuals on your board and a logical layout guides judges through your research journey. Rehearse your walkthrough until you can explain your project conversationally, and prepare for questions; the judging interview is where fairs are won. Genuine enthusiasm is contagious, so let it show.
Your Fair Is the First Step
Whichever New Jersey fair is yours, the students who advance to ISEF are almost never the ones who started in February. They're the ones who treated their regional fair as the final exam of a months-long research effort.
Get Expert ScienceFair Support
If you want expert guidance through that effort, from choosing a research question to preparing for judging interviews, our coaches include ISEF Grand Awardees and Regeneron Science Talent Search Scholars who have won at exactly these fairs and beyond.
Book a free consultation with an academic advisor to get started.
