Well I only have five chickens but when I want to get them back into the coop I use a rake. One of those big plastic leaf rakes.
No really, I walk behind them and stick the rake out to block them from going where I don't want them to go, and keep them going towards the coop. It works pretty good for me.

No really, I walk behind them and stick the rake out to block them from going where I don't want them to go, and keep them going towards the coop. It works pretty good for me.