If you are a long time ubuntu users, you probably know or heard about edubuntu, one of the offical ubuntu flavor, edubuntu is designed for educational purpose. But since version 14.04, we don't see any new edubuntu release so far.
Why there is no new release for edubuntu, is because the developers are too busy to work on the project, they seems to have another project going on and don't have time for edubuntu, you can read from the email that the developers sent to mailing list.
source : https://lists.ubuntu.com/archives/ubuntu-devel/2016-March/039281.html
The developers seems abandoned the project, edubuntu is pretty much dead, it's a shame because there are many children that need for this kind of operating system. I wish they continue the project and keep edubuntu alive, i would definitely use edubuntu for my kids.