Twitter is increasingly being used by Extension educators as a teaching and program-marketing tool. It is not enough, however, to simply use Twitter to disseminate information. Steps must be taken to evaluate program impact with quantitative and qualitative data. This article described the following Twitter evaluation metrics: unique hashtags, clicks on unique links, online surveys of professionals and their followers, pre- and post-project Klout scores, and TweetReach reports. A triangulated evaluation combining several of these metrics can provide substantial evidence of program effectiveness.