How do I know what courses to select in each semester?

To find out what courses are required for the specialization (major, minor, area of concentration) you have declared you should refer to your Program/Academic Evaluation on WebAdvisor. To determine if there is a specific order which these courses should be taken you refer to the Schedule of Studies in Section X of the Undergraduate Calendar (or the Diploma Program Calendar if you are in an Associate Diploma Program). For this information use the Undergraduate Calendar for the year printed at the top of your Program/Academic Evaluation.