A teacher's dream!

I noticed on one of the banners at the top of a page a section called a teacher's dream as I was clicking to another section on this forum, but it was too late to see what it said of to click on the link. Can anyone help me find it again. I've looked by clicking around some more but have had no luck.
Thanks

Probably a Google Ad. They have some pretty cool technology nowadays, where the ads are tailored to the page's content. Hey, if you have to look at advertising, it might as well be targeted, right? Anyway, visit the page you were at when you last saw it and click refresh a few times to see if it shows up again. Hope this helps!