April ACT

<p>I’m a junior and am taking the act in april. When should I start studying for it. Is there huge advantage/disadvantage between taking the SAT or ACT. I’m would like to go to Notre Dame: do they prefer one over the other.</p>

<p>Also do I have to send scores when I take the test to colleges? What if I end up not applying to them? How do I send scores in afterwards?</p>