You will need to perform a reading/comprehension test before you take the provided drills, since the drills set the pacing speed relative to your Base Reading Speed. Your Base Reading Speed is always determined from your last reading/comprehension test. To take a reading/comprehension test, select "Take Comprehension Test" under the Tests-Drills-Games menu. After you take the test, you can proceed with the drills by selecting "Perform Drills" under the Tests-Drills-Games menu.
