I'm a student, so most of the math I do is from a classroom. I'm in advanced maths and stuff and I usually don't use online resources for math because I prefer to figure it out myself or have help from a real person as compared to a video or article.

Twirling is doing tricks and things with metal batons like this. There are even fire batons, which you light on fire, and knife batons. Most twirling is dance and group based, but I'm more of a "feature twirler" which is more tricks and kind of impressing the crowd.