There's no way I would have been able to be trusted with that kind of responsibility at 7

Well technically since 6 in my case :3

Anywho, yeah, there used to be 2 kids in class that had the keys to the homeroom class, usually the kids who got there early, and 2 kids in case 1 gets sick or otherwise doesn't come to school etc. Those kids also usually were the class president/vice president, which came with it's own set of responsibilities.. I usually just had the key, not the president role tho, cause I was a quiet kid who didn't want all that attention x3. I got nominated for vice president once and passed on that role to someone else

Surprisingly we didn't destroy the school.. I did one time accidentally hit the wall with a bunch of coloured pencils which never washed out when we were cleaning the school over the years, but that was during a break rather than at any time I was in class alone :3