What classes do you need to take in order to become a sophomore in college?

It's not the kind of courses, it's the amount of credits that determines a students classification as follows.

The following is particular to colleges and universities that operate on a regular two semester academic year.

• Freshman - fewer than 30 credits
• Sophomore - 30 to 59 credits
• Junior - 60 to 89 credits
• Senior - 90 credits and above