School clothing orderform came out, need advice on what to order?

Ok my school order form came out today. I am a 10th grade girl and have never ordered from something like this before. It includes sweatpants: STA written diagonally on left leg, "Thunder" written on um (optional). Come in either grey or navy. Track pants: "Property of STA" written horizontally on left leg. Come in navy. I am thinking of ordering one of the two, but don't know if I should and if I do what to order. Would like to know what you guys would do! Any help advice, opinions, scenarios appreciated, taking all the help I can get.