It is important that you fulfill prerequisite courses for mathematics and chemistry prior to your first semester at SDSU in order to stay on track to graduate in four years. Some majors at SDSU (including most science and engineering majors) recommend taking Chem 200 (General Chemistry) or Chem 202 (General Chemistry for Engineers), and/or Math 124 (Calculus for the Life Sciences) or Math 150 (Calculus I) during your first semester at SDSU. Some majors (for example, biology) also recommend taking a math course in the spring semester of your first year. You must satisfy prerequisites prior to enrolling in these courses, which may be fulfilled with Advanced Placement (AP) credit or college credit that was earned while in high school. If you do not have AP or college credit for the prerequisite courses, then you will need to take the applicable placement exam(s), which we recommend taking as soon as possible.