Are you familiar with Subject Tests? Some college-bound high school students and/or their parents misunderstand the SAT Subject Tests. Some think they are Advanced Placement tests. Others think they are just another version of the SAT. Some high schoolers have never even heard of them. You may want to learn about them, particularly if you will be playing the elite (aka "competitive") college admissions game or applying to other selective schools.
Long ago, the Subject Tests used to be called "Achievement Tests." Eventually they were dubbed the SAT II, a name that is no longer official but which still lingers among students, parents, and even educators. Over the years the College Board has changed the names of their tests for various reasons. Thus, some of the confusion I mentioned above.