I'm a retired math teacher and vocational rehabilitation counselor. Currently I'm developing math curriculum for a nonprofit named Community Math. We're going to be using the CK-12 educational platform to make this curriculum available free of charge to adults who want to go to college but who have weak math skills which prevents them from pursuing STEAM careers. We'd love to hear more about what you're doing with Geogebra, especially if you're using the CK-12 platform. You can contact me at: jean@communitymath.org