Each school district has different policies, but many do not allow students to miss more than 10 days per semester or 20 per school year. Penalties for missing more than the allotted days can lead to exclusion from school activities, legal involvement with local attendance officers or expulsion from school.
Excessive absence can lead to a drop in grades and overall grade point average. For students in high school, excessive absence can also likely affect graduation. School districts do allow students to have excused absences for doctor appointments and family emergencies, but it is the school's discretion if those absences count toward the total days missed.