The ACT has four sections (reading, math, English and science) and covers more information than the SAT. There is also an optional essay, which may be required by certain colleges. Register for the essay when you register for the ACT if required by the institution where you are applying. The ACT allows 2 hours 55 minutes (multiple choice questions) plus 40 minutes for the essay. A top score on the ACT is a 36 (each section receives a score between 1 and 36, which are then averaged together for a composite score).
ACT Info and Registration