Here's a fantastic one for complex numbers. It visually motivates the "imaginary" axis, how complex numbers describe rotation and motion, and why they're useful

Here's a fantastic one for complex numbers. It visually motivates the "imaginary" axis, how complex numbers describe rotation and motion, and why they're useful. https://acko.net/blog/how-to-fold-a-julia-fractal/ https://acko.net/blog/how-to-fold-a-julia-fractal/