Writing HTML with clear separation from presentation (CSS)

Mathematics rendering from MathJax library

Fonts, Code Prettifier from Google

Interactive elements (now): Video, Sage Cell, GeoGebra, Program Listings

Interactive elements (possible): Audio, Skulpt, WebRTC, WeBWorK,

SVG graphics from TikZ, Asymptote, Sage sources

Numbering, cross-referencing matches \(\LaTeX\) version (equations, too)

Extensive code-sharing with \(\LaTeX\) conversion