The ACT is an entrance exam used by most colleges and universities to make admissions decisions. As of September 2015, the ACT has changed. Many of the changes to the test don't impact how students test or the types of questions they'll need to answer, but rather how their scores are reported and the kind of information they'll be able to gather from their results. Students have traditionally taken the ACT in the spring of their junior year and, if necessary, again in the fall of their senior year. However, more and more students are choosing to take their first ACT earlier, such as during the fall of their junior year. This gives them more flexibility to retake the ACT test one or more times, or to take the SAT or SAT Subject Tests. The ACT is offered nationally every year in September, October, December, February, April and June.