I'm Clayton Ragsdale: math faculty at Grand Canyon University and co-founder of Onyx Core Enterprises. I design and build every product myself, and I'm open to roles, contracts and partnerships.
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Every project here started as a problem in a course I teach, and every one is in use today.
An automated math-video pipeline
Turns a written math lesson into a narrated, animated video, with timing and quality checks built in. It has produced 217 published lessons.
A course companion site for college math
A mobile-first study site that gives students walkthroughs, interactive practice and exam reviews alongside their regular course materials.
A desktop autograder for spreadsheet assignments
A cross-platform desktop app that grades a whole class's Excel assignments in one step and writes per-student feedback.
AI-assisted grading feedback, inside the browser
A Chrome extension that inserts detailed, personalized feedback into student discussion replies in seconds, backed by a library audited against every assignment in the course.
Orbital on YouTube
Every video below was written, animated, narrated and checked by my Orbital pipeline. Hover a Short to preview it, or tap to watch with sound.
About
I've taught college mathematics for over six years, and every week shows me exactly where students get stuck and where instructors lose hours. So I build the fix: lessons that explain the step students keep missing, a study site that works on the phone they actually use, and grading tools that give better feedback in a fraction of the time.
I teach at Grand Canyon University, online and on ground, and co-founded Onyx Core Enterprises to turn these tools into products. Everything here I designed and built myself, and each tool is used in a real course before I call it done.
MS, Mathematics
Grand Canyon University
BS, Mathematics · BA, Economics
Chapman University
Actuarial Exam P
Society of Actuaries
Mathematics Faculty
GCU · online & on ground
Co-founder
Onyx Core Enterprises ↗Textbook author
Calculus, Differential Equations & more
Approach
Four rules that every project on this site follows, from the first commit to the first student.
Every tool begins as a real problem in a course I teach, and it is used with real students before it is called done.
Before-and-after timings, byte-for-byte refactor checks, grading audits and layout tests at every screen size.
I direct AI coding tools like Claude Code to move fast, and I review every change, every video and every grade.
No student accounts or data where none are needed. Progress stays on the device; API keys stay on the instructor’s machine.
From students
“Professor Ragsdale is the best math professor. He makes learning math so interesting. I 100% recommend him if he is teaching a course you are looking at.”
Student · MAT-262
“He is a great professor that truly loves what he does! He explains the material simply and is accessible and understanding towards his students.”
Student · MAT-264
“Professor Ragsdale is a fantastic math professor. His lectures are clear and well-organized, and he genuinely cares about his students’ understanding.”
Student · MATH-154
“He really knows how to teach and makes complex topics understandable. One of the best professors I’ve had.”
Student · MAT-345
Contact
Open to full-time roles, contracts, consulting and partnerships, in EdTech and beyond. If you're building something, I'd love to hear about it.
