Having the right tools to prepare for Local, National and International Olympiad Exams is the key to success at each level. To prepare for exams, explore our resources below to:

  • Review past exams for practice
  • Take advantage of our coaching opportunities
  • Network and collaborate

Register for the USNCO webinar: USNCO Exam Annotations Project to learn how to use the solutions to USNCO exams while preparing for the USNCO Local and National Exams, meet the volunteers who work on this project, and maybe join them as one of the authors of the annotations. Attend the webinar on November 15, 2022 at 7 PM ET.

More Resources

Review Past Exams

Links to annotated files are included next to the corresponding exam below. Detailed solutions are provided directly in the files for National Exam Parts 2 and 3.

Local Chemistry Olympiad Exams  

National Chemistry Olympiad Exams  

Detailed solutions are provided directly in the files for National Exam Parts 2 and 3.

To suggest corrections to past solutions, please submit them in the USNCO Preparation Hub.

Solutions are kindly annotated by our volunteers, view all acknowledgments. Sign up as a volunteer to annotate past exams.

USNCO Preparation Hub

Communicate With Fellow Students

This forum is open to anyone interested in USNCO. Share your favorite resources, ask questions of our volunteers, or share comments/suggestions for annotated solution guides in the relevant forums. You only need an ACS ID to login and join the conversation (a member number is not required).

Encouraging environment

Free and easy registration

Meet with people like you

USNCO Coaching

Get extra help with a USNCO Coach

USNCO Coaching program is paused for 2023. Please contact your local USNCO Coorinator to inquire about local coching or mentoring opportunities. Contact the USNCO office if you have questions.

Get extra help during 2-hour sessions for small groups, led by coaches from across the U.S. Coaching sessions will be organized over Zoom and coordinated by the American Chemical Society.

Professional coaching

Easy access over Zoom

Small group study sessions