INTERNET EXPLORER

Click on the compatibility icon in the address bar.
ie9-compatibility.png

I see some learning curriculum

Yes, if you see the screenshot, the top has arrows pointing to the icon.  It looks like a broken sheet of paper.

what does that mean when i click it

It switches IE9 to compatibility mode.

From Microsoft's site:

Compatibility View


Sometimes the website you’re visiting doesn't look right. It shows up as a jumble of out-of-place menus, images, and text boxes. What's going on? One possible explanation: The site might have been designed for an earlier version of Internet Explorer. If Internet Explorer recognizes that the webpage isn't compatible, you'll see the Compatibility View button on the Address bar. Try clicking it.
Picture of the Compatibility View button The Compatibility View button

In Compatibility View, websites will be displayed as if you were viewing them in a previous version of Internet Explorer, which will often correct display problems. You don’t need to click the button for a site after you’ve done it once—the next time you visit the site, Internet Explorer 9 will automatically show it in Compatibility View. (If you ever want to go back to browsing with Internet Explorer 9 on that site, just click the Compatibility View button again.)

but it shows on each and every other page
should i go on clicking that comaptibility tab

or revert t o ie 8

To use compatibility view for all sites:

http://support.google.com/mail/bin/answer.py?hl=en&answer=181472