The Education Collab was disbanded in 2017. There is now a User Group which is still deciding how they want to organize collaborative work. In the meantime, it's probably best to close the tasks that were assigned to collab members with the Education-Collab tag.
Hence I'm not sure with all its open tasks, as we should not have lingering tasks *if* nobody plans to look at them.
Should probably contact https://meta.wikimedia.org/wiki/Wikipedia_%26_Education_User_Group/Contact_us and ask if they still plan to use this Phabricator project and look at its tasks, or not.