You might miss school if you are a part of the Gypsy, Roma and Traveller community. This is because one of the traditions within this community is ‘nomadism’. This is a way of life where people move around and tend not to stay in one location.
Alternatively, it may be that your move around if you have a family member who is in the armed forces. They could have been deployed somewhere else, either temporarily or permanently which also impacts on where you live.