Make sure you are applying the Keys and strategies to your weekly practice tests.  Analyze your scores each week and look for ways that you can snag more points.  Ask yourself if you need to study how to analyze and manipulate scientific data presented graphically; experimental tools, procedures and design; or how to evaluate models, inferences, and experimental results over the next week. Can you identify any trends in your practice tests?  Are there any areas where you see consistent errors or consistent success?  Use this information to help you know what you need to work on next.