Hm. Bit of both. I would be annoyed as a parent as ds could not access the curriculum, but as a teacher I'd not allow "stampy spelling" as I can't cope with the noise. My ds also forgets to hand stuff in, even with reminders, but I'd do a bag check before a snotty letter home.

Btw, "disappointed" is teacher for peed off.

Have a chat. Then involve the management team of the school.

I do wholrheartedly agree 90 mins with nothing done is bad on her part, except in exceptional circumstances but you should have been in dialogue long before now in that case.