Summer school is a program, generally sponsore by a school or a school district, that teaches students during the summer vacation. In elementary and middle school, these programs are usually non-academic, though some are used for remedial instruction. However, in high school or college, students can enroll in classes for credit to be taken into account in their grade point average or their transcript. Generally, this credit is in one of two categories: remediation or advancement. For remediation, the summer school is used to obtain credit for classes students had failed the previous year. However, for advancement, the summer school is used to obtain credit for classes to graduate early or in order to lessen the load of courses during the regular school year.