Hello. You really don't have to "join". Simply post high quality education posts and we will do our best to find them. It is easier for us to find the posts if you use the steemiteducation and hive-122108 tags. Hive-122108 is the number assigned to the steemiteducation on the beta communities site. We are hoping people will use that hive tag so that curators will see our community on the beta site.