Select the topic(s) you want to practice, click the button that wants to be clicked, and answer the questions. If Scratch Cat asks for a numerical value, do not type the number in words ("4" is correct; "four" is incorrect). If asked to give a formula, don't put spaces in your answer. For any number greater than or equal to 1,000,000, write it in words (e.g., "1 million" rather than "1,000,000" or "one million"). When answering a question that says "___ and ___," include the "and" in your answer (e.g., "gravity and centrifuge" rather than "gravity centrifuge"). Scratch cat only accepts American spellings.
NOTE: The star-rearranging thing is not ready to be used.
