DD3 is in year 6. She's bright, doing well. However, I've noticed that with her spellings, when she's asked to spell out loud, she often substitutes a c for s, although realises and corrects herself. She also starts words (such as accommodation) with o instead of a, and mixes up o and a within the word.
Is this just a mouth working faster than brain kind of thing, or should I be mentioning it to her teacher?