Past midterms and finals are available online for most undergraduate courses. See here.
Follow this link for more information about MATH 0500 (Preparing for University Mathematics), a non-credit course designed to brush up on mathematics prior to entering first-year courses.
In an effort to help students, the Math department has put together the LevelUp program. LevelUp is a self-paced program of online modules on UMLearn (instructional videos, exercises, and quizzes) to get students refreshed on basic mathematical skills. Everything from basic number sense and fractions to Trigonometry and Logarithmic functions is covered, and students can do as little or as much as they wish to be prepared for any introductory mathematics course (or other science course requiring basic math skills).