Online Math For Kids What Online Source Or Software Is Best For Helping Teens With High-school Math?

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

The teenage daughter of my friend has a psychological problem with mathematics. She loves reading and has read at college level for the third year, so it is very bright. All you have problems with math. If it is confronted with a mathematical problem, very frustrated and emotional. She refuses to help herself and really having panic attacks, even if it is well-balanced and emotionally stable at the time. Can anyone help me to good websites or software or guardians who can help this child, otherwise bright with mathematics?