I am 14 and have had really bad acne. I wash my face with Bath and Body Works Foaming Anti-bacterial Hand Soap. Believe it or not, it really helps. I also have some prescription face medicines from my doctor. The dermatologist is never really available where I live, and my doctor new more about me anyway. He really helped.
If you don't want to go to your daughter's doctor, I suggest the brand Clean & Clear. They have amazing products and aren't reasonably priced!!
**ALSO** Don't have her wash her face too often. I wash mine one in the morning when I wake up, and one in the evening before bed. If she washes her face too much, it will e stripped of natural oils and such, and her face will become too dry and very painful!