Courses at the University of Sydney may vary according to disciplines, majors and degree levels. Generally speaking, in Australian universities, students need to register enough credits every semester to meet academic requirements. Here are some suggestions:

Full-time students: Most undergraduate students usually register for 4 to 5 courses each semester, which is usually equivalent to 12 to 18 credits. This will ensure that you can complete the credits required for your degree.

Part-time students: If you choose part-time study, the number of courses registered in each semester may be reduced, but you still need to ensure that you reach the required credits throughout the school year.

Postgraduates: Postgraduates usually require higher credits, so the number of courses registered each semester may be more, depending on your master's degree.

Postgraduates: Doctoral students are usually more independent and research-oriented, so the number of courses registered each semester may be relatively small. The specific requirements may vary depending on the research field and project.

Pay attention to discipline and professional regulations: different disciplines and majors may have different requirements. Some majors may require students to register for a certain number of core courses each semester, while others may be more free.

Before registering for courses at the University of Sydney, it is recommended that you carefully read the discipline manual of your subject or contact the academic consultant of the school to ensure that you understand and meet the academic requirements. At the same time, you can also consider communicating with classmates, tutors and seniors to understand their academic burden and experience in the same major or classmates, which will help you plan your studies better.