Prior to attending the class study the Question and Answers.
Question Pool Study Guide PDF

Once you feel you can answers the questions correctly, take an
Amateur Radio Exam Practice.

Once you can "Pass The Test" predictably create your FRN (FCC Registration Number) from the FCC. Bring your FRN (FCC Registration Number) to the testing session.

What to Bring to an Exam Session.

Find an ARRL Amateur Radio License Exam in Your Area.

Conner, asked me to post this reading on Ham Radio for Beginners on my way page.
Thank you Connor!