Hi Lilu,
Being removed from the classroom for missing hw is not right. You must not be in a public school??
My DS7 is as absent minded as can be. I have numbers to a bunch of moms, so I can quickly txt them to ask for HW when he is missing it. It helps a lot. And, if you can get numbers to parents nearby, you can go an write the missing HW down on a page, that is if he forgets a book.