The prescribed length of instruction upon which credit is awarded based on the total number of days in a school year
2
Semester
Usually about 15 to 17 weeks in length; there are usually two semesters per academic year and perhaps other shorter sessions
3
Trimester
Usually about 13 to 15 weeks in length; normally there are three trimesters and perhaps other shorter sessions in an academic year
4
Quarter
Usually about 10 to 14 weeks in length; normally there are four quarter sessions and perhaps other shorter sessions in an academic year
5
Quinmester
Usually about 8 to 10 weeks in length; normally there are five quinmester sessions per academic year
6
Mini-term
A session whose length is less than the regular session; usually but not always contained wholly within the regular session
7
Summer Session
A session or combination of sessions conducted after the last regular session of the school year and prior to the first regular session of the next school year
8
Intersession (Year Round Schools)
The days of optional attendance (equivalent to a summer session) for a student enrolled in a school offering a year-round program which provides three time blocks of 60 days of instruction followed by 15 of intersession
9
Long session which is longer than a semester or quarter or trimester, but shorter than a full year