I really like the museum. Great idea! Only the text "Welcome to the..." is bothering me, it doesn't really fit into the piece, I think. The whole piece is not really consistent either (especially the photos) but I have no clue how to fix that.
I also think it would be better if the wall in the back had the same color.
Your painting of the teacher: nice idea with the fingers glued to the keyboard
It's really good! I hope I'll once make things like these too.