When should you take the ACT?
The ACT should be taken at some point in the penultimate year of secondary school (or Year 12 or Lower 6th or Grade 11). Ideally, a student should prepare for the exam over the summer before the penultimate year, and then takes the exam in October, November, December, and January with a final score locked in before end of year exams approach. Then, subsequent dates can be used to take subject tests and push a good score to a great one. Furthermore, come time to write the application in US universities, a student knows which schools are in range and can select early admissions and regular admissions targets.
Sometimes students continue to take the exams through the first half of the final year of school if the exam is proving challenging or a decision is made to switch the choice of exam.