If your professor speaks quickly or is difficult to understand, you might consider asking permission to record lectures, discussions, or Zoom sessions. Remember that you need permission from your instructor before you record.
Here are some tools that you can use to record classes (again, with your instructor's permission):
If you attend lectures via Zoom, ask your instructor to record the class and provide the link to students. It may take a little while for the recording to render, so please be patient. If your instructor does not provide the link by the day after class, send your instructor a quick email. Remember to be polite and respectful when you do. You can also use a smart pen for Zoom sessions.
Livescribe is one brand of smart pen. If you are interested in learning more about this smart pen, here is a video: