What online source or software is best for helping teens with high-school math?

My friend's teenage daughter has a psychological problem with math. She loves to read and has read at college level since third grade, so she is very smart. She just has trouble with math. When confronted with a math problem she gets very frustrated and emotional. She refuses help and has genuine panic attacks even though she is very even-keeled and emotionally stable most of the time. Can anyone help us find good websites or software or tutors that can help this otherwise brilliant kid with math?