Keeping this as a word post (so not sure why I've put it in the AWAD in Schools category, but.)

Recently there has been numerous walk-outs in London and other cities by secondary school students to protest against the war, media coverage has varied in reffering to them as strikes or truancies - which is more accurate?
I mean, if a whole school walks out with the permission of staff is it truancy? Equally, how can these be called strikes if the students aren't stictly giving up anything such as pay?