This document outlines a lesson plan for teaching 21st century literacy skills through an analysis of decades using online research tools. Students will use Diigo to collaboratively annotate an article about defining decades from the New York Times. They will then create a Dipity timeline presenting their analysis of a decade and deliver an oral presentation evaluated using provided rubrics. The document provides instructions for using Diigo, Google Docs, and Dipity as well as examples of student timelines.