What is Sunday School? Sunday School is a free series of quizzes consisting of one extra question for each theme from a past week of School of Trivia. (Essentially, it’s a once-a-week version of the School of Trivia league.) Feel free to forward this along to those who might be interested! You can check your scores on the "Sunday" tab of the leaderboard page. If you enjoy these quizzes, I hope you'll consider joining the league!