A Diagnostic Test in Part I follows this introduction. This test will help you quickly identify your weaknesses and gaps in your knowledge of the topics. You should take it under test conditions （in one quiet hour）. Use the Answer Key immediately following the test to check your answers， read the explanations for the problems you did not get right， and complete the self-evaluation chart that follows the explanations. These explanations include a code for calculator use， the correct answer choice， and the location of the relevant topic in the Part 2 \"Review of Major Topics.\" For your convenience， a self-evaluation chart is also keyed to these locations.
　　The majority of those taking the Level 2 Mathematics Subject Test are accustomed to using graphing calculators. Where appropriate， explanations of problem solutions are based on their use. Secondary explanations that rely on algebraic techniques may also be given.
　　Part 3 contains six model tests. The breakdown of test items by topic approximately reflects the nominal distribution established by the College Board. The percentage of questions for which calculators are required or useful on the model tests is also approximately the same as that specified by the College Board. The model tests are self-contained. Each has an answer sheet and a complete set of directions. Each test is followed by an answer key， explanations such as those found in the Diagnostic Test， and a self-evaluation chart.