This imaginative cross-curricular resource is the perfect way to reinforce basic grammar skills as well as introduce the study of United States presidents to your class. A short biography is included for each featured president: George Washington, Abraham Lincoln, and Ulysses S. Grant. Students must study the biography and crack the code to answer a set of worksheet questions. It is within these hidden codes that students will practice proofreading, analogies, and parts of speech. Level: Medium