The quiz cannot be hidden, BUT you can put it in a topic or week and then reduce the number of topics/weeks that are visible so that the topic/week where the quiz is located is not visible!
Example:
Set the classroom setting to 12 topics.
Put the quiz in topic 12.
Copy (right click) the link location (Fire Fox) or Copy the shortcut (IE)
Paste a link to the quiz in a Lesson branch table page. Example: click here
Click Add a Branch Table Page.
Change the classroom settings to 11 topics.
The quiz is no longer visible, but is still active for your students.
Then, make sure that there is a link, per #2 in my original post, that points to the next page in the lesson.
Put the quiz in topic 12.
Copy (right click) the link location (Fire Fox) or Copy the shortcut (IE)
Paste a link to the quiz in a Lesson branch table page. Example: click here
Click Add a Branch Table Page.
Change the classroom settings to 11 topics.
The quiz is no longer visible, but is still active for your students.
Then, make sure that there is a link, per #2 in my original post, that points to the next page in the lesson.
Whether this is a good pedagogical idea, we here have not decided.