Browser Use with Google Apps for Education:
We would like to remind you of the Google Apps browser support policy, the set of guidelines that ensures clarity on the Google Apps services interoperability support. Google’s test plans have been adjusted to now stop all testing and engineering work related to Internet Explorer 9 (IE9), as Internet Explorer 11 (IE11) was recently.
Please note that you can use Chrome or FireFox, but need to make sure that you are using an up to date version.