Tailwind Placement Exams is a national partnership between the University of Wisconsin System and Castle Worldwide delivering research-proven placement tests with the industry’s most reliable test engine. The University of Wisconsin, one of the nation’s most highly regarded university systems in the placement exam field, developed the Combined Reading and Writing, Mathematics, French, German, and Spanish exams. The UW System has a 40-year track record for validity. All exams are delivered through Castle’s PASS system. Castle has nearly 30 years of test development and delivery expertise with a diverse range of customers.