Find your question
Browse a subject or search for a concept, contest, or problem number. Topic filters help you narrow it down.
An independent math video libraryA little curiosity.
A little curiosity.
A lot of math.
Hi, I'm Benjamin. In high school, I made math videos and shared them on YouTube. Now, in college, I've given those lessons a home of their own—organized by subject and topic, so it's easier to find an explanation and keep exploring.
Always free to browse. No account needed.
350math videos in
one place
one place
8subjects to
get curious about
get curious about
100%free to explore,
at your own pace
at your own pace
Find your starting point
What are you curious about?
Start with a subject. Follow a question.
There's plenty to work through.
Algebra
Expressions, equations, and the patterns behind them.
23 videos
Geometry
Triangles, circles, and a different way to see a problem.
44 videos
Trigonometry
Angles, identities, and the language of waves.
15 videos
Calculus
Limits, derivatives, integrals, and infinite series.
76 videos
Probability & Counting
Count the possibilities. Make sense of chance.
38 videos
Number Theory & Proofs
Primes, digits, divisibility, and mathematical reasoning.
22 videos
Vectors
Direction, magnitude, dot products, and cross products.
6 videos
Competition Problems
Work through AMC, AIME, and other contest problems.
126 videos
The story behind the boardMade in high school.
Made in high school.
A new home
in college.
In high school, I recorded 350 math videos as I worked through the ideas I was learning—from triangle problems and trigonometric identities to calculus and math competitions. I shared them on YouTube, where my videos have received tens of thousands of views.
Some lessons happen at a whiteboard. Others are a pencil, a sheet of paper, and a problem worth exploring. They're personal, hands-on explanations from a student who enjoyed figuring things out and sharing the process.
Now that I'm in college, I've built this website to make that collection easier to learn from. Instead of scrolling through years of uploads, you can browse by subject, narrow down a topic, or search for a particular problem. The whiteboard lessons come first in each subject, followed by the pencil-and-paper recordings.
The videos are the same; finding your next lesson is simpler. Pick a topic, pause when you need to, and try a problem alongside me.
— Benjamin Yazdi
Bring a pencil. Follow your curiosity.
Start at the whiteboard
Whiteboard recordings appear first in every subject. Pencil-and-paper lessons follow, so you can explore both approaches.
Make the problem your own
Pause the video. Try the next step yourself. Come back to the explanation when you want another perspective.
Your next “aha” starts here.
A whole library of problems. One good place to start.