Parentheses

[Unregistered]

please, please, please someone help! I need to know all I can about parentheses so I can teach it to my class tomorrow. and I have to do a good job on it because my presentation is being taken for a grade. I'm mainly just concerned about how you know when to use parentheses, rather than using commas, brackets, or dashes. thanks!

[Casiopea]

Click here and here and here.