Get to class.

As you get in the classroom; it's dead empty. As you expected, it's probably going to fill up right before the final bell rings.

"Oh, finally attending class Doe?" Mr. Peterson says with an angry tone before going back to his papers.

You roll your eyes and see that you're actually the first to arrive. You could sit anywhere you want but it's still rather early. That being said, you could sit and wait for more people to show up, or maybe go back out and enjoy the few minutes of freedom you have left.