Divide group into two/three teams.
1. Row back line, 1 ball, roll ball, ball just over 3 meter line - pick up (the faster you roll, the sooner you win)
2. Rows of back line, 1 ball, run to net, throw and catch short over net (4x)
3. Rows of back line, 1 ball, run to net, two meters distance, throw ball into net and catch
4. Lines at wall, 1 ball, 5x ball overhead against wall
5. Lines at wall, 1 ball, 3x throw ball underhand against wall, pass against wall, catch, etc.
6. Drive at wall, 1 ball, 3x throw ball from distance against wall (throw hard and far)
Add this exercise to the training