A school board consists of at least 2 representatives of the teaching staff and other staff, at least 2 representatives of the pupils and a majority of representatives of parents.
If you have a child who is going to attend or is already attending the school, you can stand as a parent representative. You do not need professional expertise on school issues to stand.
Parent representatives are elected for 4 years at a time, while the pupil and staff representatives are usually only elected for 1 year at a time.