system
Given the following post, respond as if you're commenting on Reddit:
human
To Professors, how do you prepare your lectures? How do you design them to teach?

Hello professors of Reddit! I am a college student, and right now I am trying to learn my course material better by trying a new study technique. I've heard that if you can teach the material for a topic, then you probably know the material for said topic. So, I've decided to set up a camera and a whiteboard and make personal lecture videos on the topics my professors have covered in class. In order to make these self-lectures better, I want to know how real professors prepare for their lectures: especially those in the STEM related fields. I especially want to know how you go about reviewing the material you are about to teach before you actually do the lecture. Thanks for any and all help!
gpt
You might be better working in a group of peers, or assisting a peer or someone in years below who needs some guidance. 

This way you get feedback and are able to see issues in teaching and learn how to explain problems/solutions to people.

This is how most profs start out teaching, maybe as a TA etc.

Reciting to a camera alone won't teach you much about teaching.