The ACT permits the use of specific calculators during the mathematics section of the exam. These calculators are typically standard graphing, scientific, and four-function calculators. However, certain models with features deemed to provide an unfair advantage, such as those with computer algebra systems (CAS), are generally prohibited. For example, a TI-84 Plus CE is acceptable, while a TI-Nspire CX CAS is not.
Adhering to the approved calculator list is crucial for test-takers. Using a prohibited device can result in score cancellation. The policy aims to ensure fairness and equal opportunity among all examinees. This regulation has evolved over time to keep pace with technological advancements in calculator capabilities and their potential impact on test integrity.