General Info on ACTs?

<p>Hi,</p>

<p>Apparently, my older sister signed me up for the ACT coming up this Saturday and never told me. I really don't know much about the ACT other than there's no penalty for guessing and the sections include english, reading, writing, science, math. Can you guys help me out and fill me in on whatever else is important, such as how the timing works? Or any general tips that might help? Thanks.</p>