I am really happy with Notebook 2014. It is faster and the inclusion of Response VE and Extreme collaboration make this learning tool really versatile.
GeoGebra is another great addition, although I have a lot of learning to do before I will be able to use it well. My focus this week has been to explore the app.
After clicking on the application icon, click on the search tool at the top right of the Notebook page and you will go directly to GeoGebra Tube where you can browse, select and insert a GeoGebra worksheet. To do this, click on the worksheet you want and then click on Insert.