Setup. Pairs facing each other 8 metres apart, one ball per pair. Four cones staggered in between.
How it runs. Keeper side-shuffles through the cones. Server passes along the ground: two touches and pass it back. Server then throws at head height: W catch, give it back, backpedal. 45 seconds on, then swap. Second round is weaker foot only.
Make it harder. One-touch passes. Then the server calls "feet" or "hands" as late as possible.
With 4 keepers. Two pairs side by side.
We do this in session 1, The Basics.