Scratch Cat will ask questions. Answer them with correct spelling and punctuation. If you answer incorrectly, Scratch Cat will frown and tell you the correct answer. At this point, click Scratch Cat or press space in order to move on to the next question (this is to make sure you've had time to read the answer). Don't give numerical answers in letters (write 5, not five). Don't answer the era time questions with more precision than the year. Dates for the musical eras' beginnings and ends are approximated.