* Your school's policies: Each college, university, and even high school has its own limits on summer course loads. Some may have a maximum number of credits, while others might restrict the number of courses.
* Your academic standing: Students on academic probation might have restrictions on the number of credits they can take.
* Your program requirements: Your major or program of study might have specific guidelines regarding summer coursework.
To find out how many credits *you* can take, you need to check with your school's registrar's office, your academic advisor, or your school's summer session website. There's no universal answer.