Are school detentions effective?

They are not effective in terms of re-offending, in my experience people tended to re-offend and get multiple detentions. so clearly that was not working. The issue we have however is how do you punish somebody who doesn't want to engage or be there? its very difficult to do this. Some students may judge that a 15 minute detention for not doing Hw, in which the teacher will probably help you, is worth it in order to not do it at home.