Indeed, there are many good reasons to have a test score under your belt before the fall. Specifically, it will give you time to do extensive test prep if you do not like your score; it will also help to guide your college search.
Fortunately, there are still two spring dates open for each test (neither test is offered during the summer). Registration info for the ACT can be found here; registration info for the SAT can be found here. Sign up soon to avoid missing out.
To check out Chegg’s other suggestions for juniors, click here.