Founder of Onyx Core Enterprises. I write textbooks, build adaptive question engines, design LMS platforms, and create AI-powered education tools, all rooted in years of actually teaching the stuff.
5
Textbooks Published
5.0★
Professor Rating
6+
Active Ventures
6+
Years Teaching
About
I'm a mathematician, textbook author, and EdTech founder who spent 6+ years in the college classroom before deciding to build what I wished existed. Teaching from community college to university gave me a deep understanding of where students struggle and what actually helps them learn. So I started building better math education.
Now I author calculus textbooks used in classical education and homeschool markets, design assessment content at scale, build EdTech tools for teachers and students, and create AI-assisted content workflows that actually work.
I hold an MS in Mathematics from Grand Canyon University and a BS in Mathematics with a BA in Economics from Chapman University. I've passed Actuarial Exam P and currently serve as mathematics faculty at Grand Canyon University, both online and on ground, all while running Onyx Core Enterprises full-time.
I build the full vertical pipeline: from textbook authoring to question engine, Canvas course shells, LTI grade passback, and AI tutoring — a complete ecosystem designed so schools can adopt once and get everything.
MS Mathematics
Grand Canyon University
BS Mathematics & BA Economics
Chapman University
Actuarial Exam P — Passed
Society of Actuaries
Mathematics Faculty
GCU (Online & On Ground)
Published Author
Multi-volume calculus series published through Meridian Press. Used in universities, classical schools, and homeschool programs.
Limits, Derivatives & Applications
Integration & Applications
More titles in development spanning Algebra through Multivariable Calculus, Differential Equations, and Numerical Analysis.
Full-stack education platform: AI-powered textbook reader, Canvas LTI 1.3 integration, automated grade passback, and adaptive question engine. Built to serve 15,000+ students.
Client-side question engine with 500+ templates, seeded randomization, and expression equivalence validation. Replaces legacy PHP systems at $0 hosting cost.
AI-generated step-by-step math video solutions. Manim-powered animations with Fish Audio TTS, automated rendering pipeline, and YouTube distribution.
Turnkey college math courses for Canvas LMS: 60 mini-lesson pages, discussions, quizzes, exams, and 16-week pacing guides. Full vertical pipeline from textbook to gradebook.
Services
Comprehensive math curricula from lesson plans to full textbook series. Multi-volume calculus, precalculus, differential equations, all built from years in the classroom.
Custom learning management systems, adaptive question engines, auto-grading pipelines, and LTI integrations with Canvas and other platforms.
AI tutoring systems, automated content generation, step-by-step video solutions, and intelligent assessment pipelines that scale.
Randomized, auto-gradeable question banks. From single problems to full course assessment suites, designed by someone who's graded thousands of them.
Process
No red tape, no bloated timelines. Just clear scope, honest communication, and shipped work.
We'll discuss your goals, current pain points, and what 'better' looks like for your program. No commitment, just a conversation.
I'll put together a clear proposal: deliverables, timeline, and cost. Whether it's a question bank, a textbook, or a full LMS build.
I do the work. You get regular updates, review drafts, and receive polished deliverables, on time and to spec.
Reviews
I've taught hundreds of students at GCU. Here's what they think.
"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."
"He is a great professor that truly loves what he does! He explains the material simply and is accessible and understanding towards his students."
"Professor Ragsdale is a fantastic math professor. His lectures are clear and well-organized, and he genuinely cares about his students' understanding."
"He really knows how to teach and makes complex topics understandable. One of the best professors I've had."