Escape from Algebra

My phone conversation with Ava during a recent trip to San Francisco.  She was staying with Grammy and Papa:

Ava (sounding worried):  Papa said you are going to prison.

Me:  No.  We’re visiting an old prison today, but I’m not going to jail.

Ava:  Why would you visit a prison?

Me:  Because we want to learn about the history of the prison.

Ava:  Like what?

Me:  Like the people who tried to escape.

Ava:  Papa said there is a movie about it called Escape from Algebra. Is that what you’re learning about?

Me:  No, that would be Kaleigh.