Once you’re done working through the items and explanations in this book, you can practice further by going online to testprep.sparknotes.com and taking full-length SAT tests. These practice tests provide you with instant feedback, delineating all your strengths and weaknesses.

Also, be sure to take the free numbers & operations posttest to see how well you’ve absorbed the content of this book. For this posttest, go to testprep.sparknotes.com/powertactics.