The document summarizes a study on learning Chinese characters. The study tested Oberlin students' ability to recall characters they had learned through traditional memorization methods and found retention rates were very low, with only 38-39% of characters remembered after a few years of study. The study authors developed an online tool called Skritter that uses spaced repetition and active recall to make character learning more efficient. They outline how future efficacy studies using Skritter could be set up to better gauge its success in improving long term character retention rates.