Quizzical was designed to give students practice at concise technical writing, which is the general format of multiple-choice questions.  This affords opportunities to learn and to properly employ and master discipline specific terminology that can defeat unprepared students in formal exams.  In addition, by requiring students to take quizzes, they get test practice in a way that mimics formal exams.  Finally, if the instructor requires students to validate their questions/answers and to associate a textbook figure with their answer, viewing these after a question attempt is a learning experience for the testee.