1.) How is history created? 2.) Are all historical sources reliable? 3.) How did the American colonists contribute to the coming of the Revolution? Objective At the end of this lesson students will be able to... 1.) Explain and evaluate the role of Colonel James Barrett on April 19, 1775 2.) Analyze primary sources and cite specific examples from them to create a narrative about a historical event. 3.) Evaluate the credibility of secondary sources about the Barrett family on April 19, 1775. Background April19, 1775 is undoubtedly one of the most important days in American history, but how do w Duration: 90 Minutes.