Do you have to pass both semesters of a class keep from going summer school?

Whether you need to pass both semesters of a class to avoid summer school depends entirely on your school's policies. Some schools might allow you to pass the year even if you fail one semester, provided you significantly improve your grade in the second. Others might have a strict policy requiring passing both semesters. You need to check your school's grading policy or talk to your counselor or teacher to find out the specific rules.