<p>I'm a Singaporean and I'm hoping to study in US someday. I need to know everything that needs to be known. Like, what's the difference between SAT and ACT? What are they basically about?</p>
<p>If you don't know anything at all, I would suggest buying one of the review books (you can order them online.)
But to answer your question about the SAT and ACT - one tests writing/reading comprehension and math skills, while the other includes a greater variety of topics. Most colleges accept both tests.</p>
<p>go to collegeboard.com and read about the sat, then look up the act webpage in google.com and read about that</p>