GeoGebra + Google drive
To use Google Drive with GeoGebra you need to
1) have account for geogebra.org associated with your Google ID. If you don't have one, please create one at http://login.geogebra.org/u...
2) go to http://app.geogebra.org/chromeapp/ and sign in with this account
3) once you have the screen with materials open ("Search GeoGebra Materials" from the start screen or lens icon in the toolbar), on the right side you can see Google Drive icon. Clicking it should give you the list of files in Drive. If you are using GeoGebra for the first time, there is a popup asking for permission. WARNING: browser may block this popup, in such case please open it.
If this does not work, please try deleting cookies and browser cache.
If you still have a problem, please let us know some details (which of the steps above failed, which browser was used). Thanks!