* The school's policy: Some schools require summer school to make up for failed courses, while others offer it as an option. The specific rules about credit recovery vary widely.
* Your commitment: Summer school requires dedicated effort and focus. If you don't put in the work, you won't succeed, even if you attend.
* The course's difficulty: Some subjects are inherently more challenging than others. A difficult course might still be challenging even during the more relaxed pace of summer school.
* Your learning style and the summer school format: The teaching style and format of summer school might not be the best fit for your learning style.
In short, summer school provides an *opportunity* to pass a failed course, but success hinges on your effort and the specifics of your school's program.