Repair and cover books. Some work can be done at home. Time varies with tasks, ave. Maintenance, clean-up, painting, window washing, yard work, carpentry and repairs under the supervision of the principal. On the job.
Some experience is helpful.
Semester commitment, actual time varies with the activities and the grade level. The administration seeks the assistance of a consultative group to study certain school issues. The group includes representation of teachers, School Committee members and parents. Attend 3 meetings and research topics. Time running events or record results.