Body-weight stuff (pushups, lunges, body squats) and some light plyometrics are ok though, right?
From about age 11 and onward, girls should be doing some variation of these exercises:
http://www.uwhealth.org/sports-medi...ucation-acl-injury-prevention-exercises/42908
When we started doing it, it was very interesting. As stated in the article, when our girls jumped, they landed like a brick. When they squatted, their knees were all over the place. They could play a full game without having sore muscles. The first time we did these exercises, they could barely walk the next day. You don't want them to be that sore every time, but it was eye opening how little we had been working those important areas from "normal" soccer stuff.
U12/U13 is the age where injuries starts to appear. If your coach isn't doing anything mentioned in the article, have your daughter do it at home 2 or 3 times per week.