* The school's policy: Each school district, and even individual schools within a district, sets its own criteria. Some might have a specific GPA cutoff, while others might use a combination of GPA and individual course grades.
* The student's grade level: High school students often have different requirements than middle or elementary school students.
* The reason for summer school: Summer school might be required for failing grades, for credit recovery, or for enrichment programs. The requirements will differ depending on the purpose.
To find out the specific average required for summer school, you need to check your school's policies. This information is typically available on the school's website, in student handbooks, or from your guidance counselor or teachers.