Here is the (I guess new) link for the Google for Education Training Center, where you can access open online GoogleApps courses as well as the tests to take to become a certified Google Educator. (As far as I know, the tests are available to anyone, independent of having taken a course, though you wouldn’t want to take them without a more-than-solid understanding of the GAFE suite.

And to go right to the test(ing center), click here. You do need to make a separate Google Testing account (you can of course use your same Google info, but it won’t work without creating an account; the testing account is not the same as your regular Google account).