Respuesta :

The sentence is stating what the person did first in the list of all the things he/she did in the rest of the paragraph.

See in the sentence how it says, “First, I went to the wrong classroom for math."



This is showing that this is the First problem that was gonna happen out of a list with the Transition word being First. After this, it would be an example like.

Next Jack spilled orange juice on me at lunch.