Difficult one...is your DD bored, and expressing it? Our DD was bored, bored, bored in first few weeks of Y7, enjoying the friendships, TLC, sport, but coming home saying she was bored...quote:' what am I going to do for a year whilst the others catch up' (which I took with a pinch of salt, but did listen, as it seemed quite mature that she didn't just want to 'coast') She had passed the entrance exam for another (also all girls) school, I phoned them, they checked her results and were kind enough to offer her a place. More academic school, moved her October half-term, easily survived the move, kept in touch with the friends she had made, thrived, and got an academic award at the end of the year. A term later another girl at the original school did the same thing...wrong school for my DD, mea culpa.
She is very happy at the new school, and doing well, but she would prefer a mixed environment (which is what she has been used to at primary school, and has at home) so she's just sat for a local mixed Indie (where her brother has just started in Y7), 13+ entry...her decision, may not make it through, but nothing ventured...
Presumably it's your DD saying the lessons are 'boring' and the teaching's dull...? These girls are quite mature, maybe you should explore what other options she may have...?