All of the activity sheets can copied as a google doc.
Look for the make a copy drop down on the lesson plan pages and then click google docs.(looks like the pic above) This will prompt you to make a copy and it will add that document to your google docs. You can then share that with the students. If they want to type on it themselves, I would think that they would also have to make a copy as well.
As far as I know, there in not one big repository of all of the activity sheets as one click. You will have to add them as you do the lessons. Hope this helps.