How do I participate in the ATD communities of practice? ATD KB Admin Updated October 14, 2016 19:23 Follow Visit the community page, comment on the blog, connect with the community manager, connect on our many social media channels, and share your knowledge! Related articles What is a community of practice? How much does it cost to join a community in addition to the ones that come with my membership? How do I determine which community of practice to join?