Pooped from the poster project

I'm tired. I've spent untold amounts of time during the last two nights working on The Babydoll's social studies project. The teacher was explicit in stating that the students should do the work and not the parents. Great. I tried to adhere to that. She chose the pictures she wanted to use. She glued the pictures. She decided where they should go on the poster. She wrote the sentences to caption the pictures (of course, I had to interject a bit here--what kind of English teacher doesn't correct the grammar?) So why is "supervising" so exhausting???