I have a 5.5 year old who is attending public kindergarten for half-days only, after homeschooling previously.
If your daughter's school is amenable and your family situation allows it, half days have provided a good compromise for my son that balances his access to a classroom environment (particularly given his social inclinations) and to material in his ZPD for areas of interest.
I think the key is to document--and have the school independently document--progress in the areas you teach at home (whether by tests, work samples, or some combination thereof.) This provides a nice record validating the efficacy of your work and the value of the arrangement in terms that are both meaningful and actionable to the school going forward.
