You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract Twitter Opens Online 'Flight School' For Agencies Platform Aims to Familiarize Shops With New Products to Keep Ad Dollars Coming By Mark Bergen, Published on August 27, 2014 0 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.