The co-author of the article linked has a very "fun" book on how to better draw on whiteboards, particularly for topology: https://link.springer.com/book/10.100

The co-author of the article linked has a very "fun" book on how to better draw on whiteboards, particularly for topology: https://link.springer.com/book/10.1007/978-0-387-68120-7 https://link.springer.com/book/10.1007/978-0-387-68120-7 His main example in the book is showcasing the sphere eversion.