This document contains summaries of various Tableau dashboards, visualizations, and resources from December 2015. It includes summaries of the top 5 dashboards of 2015, as well as summaries of dashboards analyzing Beatles data, US flight delays, NFL history, World Series ticket prices, and holiday travel patterns. It also contains summaries of resources for custom geo coding, quadrant analysis, secondary data sources, locking project permissions, embedding web edit, Mapbox integration, improving custom shape performance, and analyzing Star Wars data. Many of the summaries include ratings for simplicity, usefulness, and appeal.