what is a characteristics of the disease std's

By STD I am assuming you mean sexually transmitted disease.

An STD is a disease or infection that can be spread between humans having sex.

For more information, I think Wikipedia has a good article:

http://en.wikipedia.org/wiki/Sexually_transmitted_disease

obviously sexually transmitted, however the symptoms can come and go depending on the disease. her a just a few symptoms:

Abnormal l bleeding

obviously sexually transmitted, however the symptoms can come and go depending on the disease. her a just a few symptoms:

Abnormal l bleeding
Swollen glands in the groin
Discharge
Painful or difficult urination
Fever
Headache
Muscle ache
there's tons more.

I'm DYING to know what kind of gym class this is :)

When I went to school, we had Dodgeball and Basketball for gym activities :)