Formula and Reference Sheets

Use this list to review the formulas students will need to know for test day.

Cambridge Educational Services, Inc. offers and scores tests from ACT, Inc., The College Board, and other testing companies. These are retired tests, intended for practice purposes only and not for official administration, and are based on high school curriculum as of the copyright dates of the tests. Cambridge’s products and services, including its score reports, are not approved or endorsed by ACT, Inc., The College Board, or the other companies that develop the tests, and Cambridge has no affiliation with any of those entities.