This is my DD. Can play Vivaldi but can't or won't do Twinkle variations.

At first, I thought it was a non-compliance issue but she seems truly unable to memorize them. I don't understand. She memorized 30 minutes of music for her recital but she can't play Twinkle Twinkle Little Star beginning to finish.

I think her mind goes somewhere else if she isn't challenged. I'm watching for ADHD.