DS is 8, in his first proper year of school (not the UK) and its become clear this year that his forgetfulness is an issue. He regularly forgets to do homework, forgets his school textbooks (either at school so doesn't have them at home to do homework or at home so he doesn't have them in class), forgets his backpack entirely, forgets hats, coats, gloves etc. at school and has even forgotten to get dressed and gone to school in his pyjamas. He is regularly getting into trouble at school because of this, his teacher says its a daily issue.
I'm not home in the morning so can't make sure he has everything, his dad usually is and tries but he's usually leaving for work at the same time as DS leaves for school so its very easy for DS to forget something at the last minute and it goes unnoticed (and OH has his own issues with forgetfulness). He goes to after school club in a separate building so even if he realises he forgot something in class before coming home he can't get it as the school is locked.
I try to sit down with him to do his homework but half the time he can't remember what homework he has (the teacher writes what is set on the class web page but DS often has different homework to the rest of the class so its not always helpful, plus when he's forgotten his books he can't do it at all)
His teacher suggested putting up a reminder board to help him, which I will try, but looking for any other idea if that doesn't help enough. Consequences like detention at school and screen bans at home haven't helped at all so I don't think he's choosing to not do his homework etc., he just really can't remember.