The school website is often the best place to find out who your teacher is. Most schools have a staff directory that lists the names and contact information of all teachers. Simply visit the school website and look for the staff directory or faculty page.
School app
Many schools also have an app that you can download to your phone. These apps often include a staff directory that you can use to find your teacher's name and contact information.
Email your advisor
If you cannot find your teacher's name on the school website or app, you can try emailing your advisor. Your advisor will be able to tell you who your teacher is for each of your classes.
Ask a classmate
If you are still unable to find your teacher's name, you can try asking a classmate. They may know who your teacher is for a particular class.