The SAT taken by prospective college students across the country will go all-digital starting in 2024 and will be an hour shorter, the College Board announced in a statement Tuesday.

The SAT is going digital in the U.S. starting in 2024, when the test designed to predict college readiness will shorten to two hours and allow exam-takers to use a calculator on all math sections.

SAT sites, often hosted by high schools, are working to update exam security and COVID-19 safety protocols to accommodate hundreds of expected students in the region registered for mid-March testing.

The College Board held the last pen-and-paper SAT in the United States in December 2023. Going forward, the SAT will exclusively be administered in a digital format.

The number of SAT test takers declined from 2.2 million high schoolers who graduated in 2020 to 1.5 million in the class of 2021, according to the College Board.

The SAT college admissions exam is now entirely online. Rather than filling in a bubble answer sheet with a No. 2 pencil, US test-takers will be using a computer.