When I was a kid I kept failing classes because I'd lose my homework. I'd finish it, but between the dining room table and the classroom it would just walk away. Sometimes it ended up in my backpack, sometimes it didn't; sometimes I finished the homework at school and it got home in my backpack but wasn't there the next day.
To attempt to address this, my parents got me a neon orange folder to put in my backpack; it was my homework folder, all homework was to go into that folder and that folder only, and it was to only come out of that folder when it was being worked on. I was to put homework in the homework folder as soon as it was assigned and if I'd worked on it, put it back in the folder as soon as it was finished. The logic here was that using the folder was supposed to be automatic, and you wanted a bright color so it wouldn't get lost in the depths of a backpack.
I think I lost about eight of those before my parents stopped buying orange folders.
So it was very frustrating to search "how to be organized at work as an adult with ADHD" only to get a list that said "set alarms and write things down and try to make friends with a more organized person" which was immediately followed by tips to help your ADHD child stay organized and the one right at the top was to put their homework in a bright folder so they couldn't lose it.
If you have been harmed by the ADHD Tips Industrial Complex you may be entitled to a packet of fun-dip and a cactus cooler as consolation for losing your homework folder again.