Edubuntu may not be as well known as Ubuntu, but it's still an important product from Canonical and has just reached version 13.04 Beta 1, along with Kubuntu and Xubuntu.
There aren't too many details about this release of Edubuntu, but it does share a lot of content with Ubuntu 13.04, which means that it's based on Linux kernel 3.8.
“This build allows developers and users to evaluate early changes in this release and no details are finalized yet. Features that were partially implemented in Alpha 1 and not completed have been removed in this Beta build and will be re-integrated after the release,” states the official release.
Download Edubuntu 13.04 Beta 1 (Raring Ringtail) right now from Softpedia. Remember that this is an alpha version and it should NOT be installed on production machines. It is intended for testing purposes only.