Do I need to take Precalculus if I don plan to take Calculus?
Not necessarily, but it is probably a good idea to take Precalculus. Most colleges require at least one math course that is more advanced than Algebra 2. The precalculus course fills that requirement. Also, even if a student is not planning to take calculus during high school, there is a good chance that it may be required when they get to college, and the precalculus class is important preparation.