When picking out courses, you want to keep a couple things in mind: credits and content.
A credit refers to how many hours are spent in class per week. A three credit class meets for about three hours per week, while a five credit class will meet for five hours per week.
There is no minimum or maximum number of credits that a student on probation has to take. However, it is recommended that you do not take more that 12-13 credits in order to avoid too heavy a course load.
It is also important to pick courses that you believe you will do well in. It’s best to meet with an advisor who can discuss courses that would play to your strengths and help you make degree progress.