she has struggled mainly with her spelling. She definitely not exceeding expectations in reading though. If you have any suggestions, shoot. I won't turn my nose up at any new ideas when the current route is obviousy not working well.
All IMHO, YMMV, & from my own experience in helping daughters' friends as well as managing & working with young adults & teens in Fed. job training programs - so obviously feel free to discard the suggestion as you know your daughter best:
Learning to spell goes hand-in-hand with learning to read, reading skills being paramount IMHO. As you read you unconsciously absorb words - not just the letters but the shapes and the correct contexts. That's really how we all learn to write/spell, by reading.
Seeing as your daughter, while not excelling at reading you say, has not experienced criticism of her reading skills by a teacher so is 'wide open' to feeling good about reading & that it would be helping her with spelling without her realizing it (no criticism or talk of 'studying' involved); I'd suggest using reading as the tool to helping her with the spelling difficulties.
I'd suggest:
Tell the teacher involved that the rule for your daughter is if she's to be kept back in class ("detention" is not to be used), she's to be given suitable books to read with an encouraging word or two and a smile - no spelling drills, no way.
As you & everyone are overwhelmed with renovations & will be for a while: Ask the teacher of the next grade or two up if they have a shy, kind, good reader who needs a self-esteem boost that they would recommend as a 'friend/helper' for your daughter - that the two read together during recess or lunch break a couple of times a week - win win!
This is where your Grandmother could really help (& it would make her feel genuinely needed), tell her your daughter needs to start reading more but needs someone to read along with her that she feels cuddly & confident with.
If you think reading is worth a shot, you or Dad take her to the library that has the best children's section & turn her loose with a basket - let her make her own choices. Comics, magazines included if she wants them - they have words & pictures to associate the words with. (I still have our daughters' Asterix collection - always remember the youngest at around five earnestly telling my astonished friend about how the mean Romans invaded Gaul "but it's called France now 'cos Asterix and Obelix and Dogmatix beat up the Romans." lol)
Above all, which I'm sure you know anyway :smile:, don't let anyone - emphasize this to her teacher - associate
the fun of reading with her spelling. You know what smart, sharp little cookies they are.

That'll turn reading into a punishment of sorts - the last thing you want obviously. Reading is fun, a warm fuzzy, a treat, a reward, all good things. Hopefully it will help turn worrying, scary words into good things that one reads & enjoys & somehow, magically begins to learn to spell them. Cool!
Hope that's useful & of some interest.