GeometryEditor: An SVG Based Tool for Plane Geometry and Mathematics Education. Geometry is an important part of mathematics. A Web-based authoring tool, GeometryEditor (formerly GeoSVG), that makes creating interactive geometry and other mathematics lessons simple has been developed. GeoSite is a website that supports publishing manipulatives authored using GeometryEditor. Teachers and other experts can easily create and share interoperable geometry-based experiments to illustrate mathematical concepts. GeometryEditor and GeoSite combine to provide a complete authoring, teaching, and learning environment with plane geometry manipulatives.