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High School Hackathon at Discovery Cube

Saturday, April 26 and Sunday, April 27, 2025 OCSEF is excited to bring our 70-year legacy of furthering STEM education to modern computer science competitions. Our Student Ambassadors have partnered with the Discovery Cube to host a new FREE coding event called OCSEFhacks in their 10,000 square foot theater. This exciting 2-day hackathon is open

OCSEF – Chapman High School Research Conference

Saturday, April 26, 2025 9:00am to 3:00pm The annual OCSEF–Chapman High School Research Conference is a unique enrichment opportunity focused on STEM careers for Orange County high school students that participated in our fair this year. Registered high school students will share their science fair projects and related experiences while engaging with Chapman undergraduate senior

2025 OCSEF Winners & Nominees for CSEF, Thermo Fisher & ISEF

The 70th Annual Orange County Science and Engineering Fair (OCSEF) celebrated its winners on Sunday, March 23 at Chapman University. All of the young scientists and engineers who participated this year should be proud of what they accomplished through their projects! Starting from September of last year, students were invited to submit their STEM projects for OCSEF

The 70th Annual Orange County Science and Engineering Fair Awards (2025)

Applied Mechanics / Structures & Mechanisms / Manufacturing JUNIOR DIVISION First Place Srivardhan DongreMohan GandhiNeil Iyer  Second Place Harrison GuKaelyn James  Third Place Sahana Samra  Honorable Mention Malachi CavazosKiara SinghalSamantha Skacal SENIOR DIVISION First Place Jia Tong Lin  Second Place William HongHyunjoon HongHexu HuangDarren Shen  Third Place Xingyi DuanTyler KimZephyr

Top 3 Interview Tips from Maya Gandhi

Created by our multi-award-winning student, Maya Gandhi, this video offers valuable tips and insights on how to interview effectively with judges. Whether you’re preparing for a competition or a formal interview, Maya’s practical advice will help you make a positive impression and approach the process with confidence.

Science Fair Statistics 101: How to use statistics in your science project

The objective of this video is to help you use statistics in your science fair project for the 2025 Orange County Science and Engineering Fair (OCSEF). It uses a sample science project that follows the instructions in the OCSEF slide template for science projects. The results slide in the OCSEF template includes a graph of

2025 OCSEF Registration

Registration is now open for the 70th annual Orange County Science & Engineering Fair! Don’t wait to complete your Online Application to register your project – the first step of participation in 2025 OCSEF.

Ask a Scientist/Engineer

The Ask a Scientist/Engineer program is an opportunity for students, grades 6-12, to ask questions and receive guidance from a scientist or engineer about any aspect of their project. These are informal ONE hour virtual events starting at 4 pm on selected Saturdays. Students must register by the Thursday before the Saturday session they want to attend.

OCSEF Students are Thermo Fisher Junior Innovators Challenge Finalists

Society for Science announced that Jocelyn Mathew and Rhea Sreedhar are among the 30 finalists in the 2024 Thermo Fisher Scientific Junior Innovators Challenge – the nation’s premier STEM research competition for middle school students. Jocelyn, an 8th grader at Fairmont Private School (Anaheim Hills campus), entered her OCSEF project titled “Optimizing Microbiologically Contaminated Wastewater Treatment

OCSEF Academy 101 – Workshop Series

The Academy 101 workshop is an introductory course for students (grades 6-12) to learn how to conduct a science or engineering fair project. This FREE virtual workshop is a series of four Saturday sessions (1 hour each) designed for students with no prior science/engineering fair experience (click here for flyer). Each student must register by