Elliptic Disk model for spherical geometry
Elliptic Disk model for spherical geometry, without documentation
Poincare Disk model for hyperbolic geometry
For a free version of Geometer's Sketchpad, go here for MacOS or download here for Windows
Math 1165: Numbers and Algebra, related activities, and Desmos versions
Math 1166: Parallels in Geometry, related activities, and Desmos versions
GeoGebra resources: https://www.geogebra.org/u/bfindell
Ohio MAA Spring 22 presentation
Meaningful Math Fractions to Functions, SWCSD presentation and notes
Euclid the Game: https://euclid.findell.org