A standardized test widely used for college admissions in the United States, and is required by nearly all U.S. universities.
The SAT measures students' skills in mathematics, literacy, and writing, while also being administered under a tight time limit. There is no age limit to take the SAT, and you have as many tries as you want, so it is recommended to register early to make sure you get the score you want. When practicing for the SAT it is best to start early and take as many practice tests as you can.
Resources to Study From
Barron's SAT​ (Book)
The Official SAT Study Guide (Book)
The Princeton Review (Book)
Ivy Global's New SAT Guide (Book)
Khan Academy​
CrackSAT