The American College Testing (ACT) scores are the average of the test takers sectional scores in math, science, English, and reading: 36 is the highest possible score, and one is the lowest. The average ACT score is 20.8, which puts you in the top 50 percentile, so 21 and above puts you in the upper echelon. Getting 24 is a strong score, puts you in the top 25 percent and gives you more colleges to choose from. Anything above 24 is a very strong test score. Once you get more than 24 you are in the top 20% and from there your chances are outstanding. Obviously each institution has there own standards, but generally speaking, higher scores are a good way to push your application to the top of the stack, in what can be a very competitive environment.