Substructure Math

Tools built around your math competition.

We have been running competitions for over fifteen years. We know how collecting answer sheets, entering and checking data, and getting results back to teachers can eat up your time, so we build software that takes that work off your plate.

We work with events of every size and budget, anywhere in the world. Tell us what you are working on or what keeps slowing you down, and we will help you find the right solution.

Tell us about your event →

Events we partner with

  • Math Kangaroo Asia Camp Handwritten answer sheets digitized and tens of thousands of answers graded online, from collection to results.
  • Berkeley Math Tournament Thousands of students on campus each year, running on our registration, grading, and day-of tools.
  • Local and regional events From contests put on by school math clubs to national competitions in the United States and Asia.

Selected work

[Ag] Berkeley Math Tournament 2026 Individual Round ID Name Team 1 2 11 12

Atomic Grader

Answer sheets are digitized and graded online, allowing events to be graded from anywhere in the world. At the Berkeley Math Tournament, it grades thousands of answer sheets in under two hours.

Guts Scoreboard showing a live leaderboard and team scores

Guts Scoreboard

A Guts Round is a fast-paced team event where answers are graded in real time and standings are shown live to everyone in the room. Our scoreboard has run Guts Rounds at MMATHS, the Berkeley Physics Tournament, and more.

Team Leads

Moor Xu

Moor has run math events in the US and China for over fifteen years and is part of the organizing team for Math Kangaroo in China. He leads technology entrepreneurship programs around the world, from Europe to Japan and Nigeria.

He studied mathematics at Stanford and taught at UC Berkeley as a graduate student.

Nathan Wong

Nathan is a software engineer currently working at Cognition. He has over a decade of professional experience building applications and infrastructure, and has been organizing math competitions for even longer.

He graduated from UC Berkeley with degrees in mathematics and computer science.

Contact

If you wish part of your event could run differently, or a tool has forced you to compromise, write to us. We have probably dealt with something similar, and we would enjoy thinking it through with you.

We usually respond within two days, and we are happy to jump on a call and talk things through, no commitment.