Of course it would be 'gross' to change your tampon in class, just as it would be 'gross' to go to the bathroom while you're in class. If you need to change your tampon simply let your teacher know you're going to the bathroom and go change as anyone else would. Ideally time changing your tampons so you can do it between class rather than missing your lessons.
Would you urinate or defecate in front of your class? Of course not. Go to the toilet and take care of business.
You need to weAR A tampon. Or if your not sure if a tampon will protect you fully, wear a panty liner.
Reason: If You Go Any Longer Then That, The Blood From The Tampon Will Get Soggy And Leak Out Into The Pool.
You would change just as you would normally - take a tampon from your locker and go change in the bathroom. If someone was to notice it doesn't matter, people know that as a woman you menstruate and there is no shame in that what-so-ever.
The gross weight of the 2009 Mercedes-Benz CL-Class is 5534 lbs..
The gross weight of the 2007 Mercedes-Benz M-Class is 6240 lbs..
The gross weight of the 2009 Mercedes-Benz S-Class is 5655 lbs..
The gross weight of the 2008 Mercedes-Benz S-Class is 5655 lbs..
The gross weight of the 2014 Mercedes-Benz G-Class is 7058 lbs..
The gross weight of the 2002 Mercedes-Benz G-Class is 6834 lbs..
The gross weight of the 2014 Mercedes-Benz C-Class is 4453 lbs..
The gross weight of the 2002 Mercedes-Benz SLK-Class is 3627 lbs..
The gross weight of the 2008 Mercedes-Benz CL-Class is 5465 lbs..