I've spent 20+ years watching students believe they're not "math people" — and then watching that change when they are given the opportunity to learn at their own pace, in their own way and without judgement. That's what gets me out of bed in the morning. Not the curriculum, not the grade level targets, but helping people discover that math was never as scary as they thought.
I didn't set out to be a math teacher. I spent a decade as a geologist, using mathematics every day to solve real problems across Northern BC, Nunavut, and Australia. Math was a tool, logical, practical, full of patterns. I never understood why so many people hated it.
Then I accidentally became a math teacher. I was interviewing for a Geology position in Squamish when the principal caught me on the way out and asked if I'd consider teaching mathematics instead. I had a few days to think about it. The more I thought about it, the more I wanted it.
That decision led to 20 years at Howe Sound Secondary School, where I served as department head and eventually created a numeracy coordinator role within the School District, working with elementary and middle school teachers to help students who were falling through the cracks. Since moving to Toronto in 2021, I've worked with students at The Cole Academy, kids who had largely given up on school entirely, and watched them discover that they were capable of far more than anyone had told them.
I may not be in a classroom anymore, but the mission is the same: take the fear out of math and bring the humanity back in.
Learn more about my concept-first approach to teaching math →
Through online courses, teaching resources, and coaching, I work with students, parents, and educators to do what I've always done, meet people where they are, build from the ground up, and make math feel like something that belongs to them.
Whether you're 8, 18, or 80, it's not too late to change your relationship with mathematics.
Self-paced video lessons that focus on understanding, not memorization. Organized by concept — not grade level — so you can start where you need to, fill in the gaps, and build real confidence over time. Each course includes clear notes, examples, and worksheets to reinforce your learning.
Downloadable lessons and worksheets for teachers and homeschooling parents, designed around complete concept progressions rather than curriculum pacing guides. Start from the beginning, identify the gaps, and build from there.
One-on-one and small group coaching for students, adult learners, parents, and educators — including Teacher Professional Development. Tailored to where you are and where you want to go.
I bring families, schools, and communities together through interactive Math Nights that make mathematics feel approachable, playful, and fun for everyone in the room.
Let's figure it out together. Book a free 20-minute consultation and we'll find the best path forward for you.
"You were my favourite teacher throughout all of grade school, not just in math. You made the exercises fun, the teaching engaging, and you were always happy to give some background, purpose, and application to the equations and formulas we were learning. I always looked forward to your class throughout the years that you taught me. Your teaching style and the effect it had on my enjoyment of math definitely played a part in me deciding to go into the field of engineering."
2014 Graduate from Howe Sound Secondary School
"He was a standout teacher in my high school career. His enthusiasm, knowledge, and dynamic teaching method left a huge impression on me. I am now a private math tutor, working with some of Mr. Gregr's students and they all agree that Mr. Gregr makes it a much more enjoyable experience. I can say with great certainty that anyone who gets the opportunity to have Mr. Gregr assist them in their journey through math will come out the other side with an amazing experience from working with him!"
2007 Graduate from Howe Sound Secondary School
Mr. David is a passionate math educator dedicated to helping students, parents, and educators rediscover the beauty, meaning, and excitement of mathematics.
With over two decades of experience teaching math, he brings clarity, empathy, and real-world perspectives to every concept he shares.
Before becoming a teacher, Mr. David was a geologist, using mathematics daily to solve real problems in exploration and decision making. That experience shaped his belief that math is not about memorizing procedures, but about understanding patterns, relationships, and ways of thinking that apply far beyond the classroom.
A central focus of Mr. David’s work is addressing math anxiety, an experience that affects students and adults alike. He believes that fear of math often comes from gaps in understanding, rushed instruction, or a lack of supportive learning experiences. Through carefully scaffolded lessons, clear explanations, and engaging resources, he helps learners rebuild confidence and develop a healthy relationship with math and numbers.
I graduated from the University of British Columbia in 1991 with a B.Sc. in Economic Geology. This began a decade spent exploring the geological landscapes of Northern BC, Nunavut, and Australia. At the turn of the century, I returned from Australia, completed an Education Degree and began my own mathematical journey as a teacher.
I was applying for jobs throughout British Columbia and was particularly interested in a posting for Squamish BC. I was excited for my interview in the summer of 2001 as I was applying for a Geology Teacher position. The job was perfect, the location was perfect, I was going to get this job. After our interview, which I felt went well, they informed that the position had been filled internally. My heart sank; I thanked them for their time and left. The principal of the school caught me before I left and asked if I’d be interested in teaching mathematics. Now I was an average student in high school. I didn’t excel at math but found it relatively easy and certainly didn’t “hate” it. I saw it as a tool and learnt how to use it. I found the patterns and logic comforting. I had a few days to think about the job offer and the more I thought about it, the more I wanted it. I ended up teaching for 20 years at Howe Sound Secondary School in Squamish BC. I was department head for half of that. I created a numeracy coordinator position in the School District and spent 5 years helping elementary and middle school teachers develop strategies and resources to help students transition between schools, particularly in mathematics. Since moving to Toronto in 2021 I started with a new school (The Cole Academy) catering to students who didn't want to, or couldn't be, in a regular classroom. I was fortunate to be involved in this unique school from its inception so I was able to develop the math program for students in Gr. 3-8. The students who had, in the past, avoided school were now eager to come to school and excelled in ways they had never experienced. It was truly one of the most rewarding experiences I have had as an educator. I may not be in a classroom anymore but my journey to share my passion for mathematics with as many people as I can is still very much alive.