Hawaii law requires 180 school days a year.  Hawaii was the last state in nation to set minimum instructional time  This was done by the state, over fierce opposition by the teacher's union, to shed its reputation for having the least amount of instructional time in the nation, 178 instructional days previously.

Hawaii students attend class an average of four hours and 43 minutes per day, behind the five-and-a-half to six hours per day of instructional time in most states.

Judging by the applicable statute, "a teacher" has it pretty easy in Paradise.