Hi A. :-)
I am a Registered Nurse and an Energy Medicine Practitioner. You mention you sense your daughter is internalizing frustrations. I can offer a FREE technique of energy balancing which will help bring a sense of "calm" to your daughter's brain, so that it can communicate with itself and destress.
If you want, visit my website www.amyfreundbodytalk.com and select the tab that speaks about Dr. John Veltheim teaching the CORTICES technique. There are two videos there. The first speaks about how STRESS causes so many imbalances in the brain.. that's our main hardrive! And, how balancing the brain by doing the CORTICES can immediately help bring a state of calm (parasympathetic response) so that the brain can heal itself.
It's simple and free and you may just be QUITE surprised as your daughter's change in stress behavior. Also, do this on yourself and notice how you feel!
hugs,
A. www.amyfreundbodytalk.com