My examples of cool interactive maths with the online Desmos Grapher Maybe a guide on practicala use of Desmos actions will come later.
The Lorenz Attractor in 3D - https://www.desmos.com/calculator/qnlbav9asr
Graphing all sorts of objects in 3D - https://www.desmos.com/calculator/799tfd4lh4
Koch substitution fractals - https://www.desmos.com/calculator/xlncdm5i13
Runge-Kutta Differential Equation Solving - https://www.desmos.com/calculator/w4wqc2nvaf
Explore the periods of Mandelbrot Set orbits - https://www.desmos.com/calculator/gvb2oweuxb
The Collatz Conjecture tester - https://www.desmos.com/calculator/8ksudpq6si
Edgeworth Boxes modeling General Equilibrium in markets - https://www.desmos.com/calculator/p4km1kzqgb
Slow Fourier Transform - https://www.desmos.com/calculator/ml32uned2s
Lambert's Parabola Theorem - https://www.desmos.com/calculator/p2mw7z4hrz