Well it depends on your nursery staff but if they can't get the hang of two parters (honestly how hard can it be!!
) then avoid poppers too!! So you will unfortunately need to stick to velcro pockets.
Stuffing - our best is a standard mf insert (e.g. the fuzzi one or similar) with an easy peasy hemp jersey booster/insert under - nice and slim and very absorbent.
The other insert I use for pockets is the blueberry long hemp and mf combo onesize one but they're a bit hard to get hold of...
and probably overpriced for what it is...
So for nursery our best nappies are:
Blueberries - the velcro onesize ones. (we've only got one and it's a minki but they think it's wonderful!!)
Bumgenius - our nursery LOVE these as they are the most similar to disps. I've got a V1 and a V3 and there's not a huge difference TBH - a very reliable nappy.
Happy Heinys (altho' the prints aren't good for heavy wetters)
Upsydaisys as these are velcro (altho' front opening which might confuse them) but I've not tried these at nursery yet (our silver one is too nice to send!! :lol)