Google Maps Engine issue
If you use Google's new maps engine, you need to be aware of a problem in using the "share" button.
When you do, it produces a link like this:
https://mapsengine.google.com/map/viewer?mid=zPZH3TAj6XZQ.knDBdB (That's not a complete link because it goes to a student's work in progress.)
The problem is that "viewer" in the URL. If you click on it and are not signed into Google, you get nothing. Not very good for sharing stuff with the general public - or with your professor for grading (grin).
The solution is to substitute "embed" for "viewer."
You'll find more details here:
Let's hope Google recodes that button.