In Twitter, #ALDep has been established as a joint hashtag for ALD-related contents. In November-December 2019, a new hashtag was initiated to discuss educational learning and teaching activities and materials related to ALD: #ALDepEdu. If you wish to give feedback on this Aalto ALD OpenLearning site via Twitter, please add also #ALDOpenLearning and @rlpuu in your tweet. (Some advice for new Twitter users, written for the ALD community a few years ago: http://aldhistory.blogspot.com/2016/07/advice-for-new-twitter-users.html)