Ok, I was able to go into the locked room and Jason was there, been able to get to where you need baking soda, but can't seem to find it, any hints? Also the fish in the science lab like to fly around the room lol, and the blackboard in your house with the game of hangman on it I swear I've seen in another game.
For the baking soda : Try the cafeteria, the small building outside the school building.
Yeah, the fishes are kinda buggy, Iknow how to fix it but honestly it's more like a fun glitch than an high priority one.
And for the blackboard, that isn't a surprise : it came from a very popular asset pack that is widely use in the game dev community.