This GeoGebra book contains links to a plethora of problems teachers can use to provide challenging enrichment activities for students that excel within the regular curriculum. Many of the problems in this book come from those posted on Twitter by Antonio Gutierrez (https://twitter.com/gogeometry) and Alexander Bogomolny (https://twitter.com/CutTheKnotMath).
Each challenge (and corresponding animation) is mapped to one (or more) of the CCSS High School: Geometry standards.
