Divide group into equal attackers/defenders. (e.g. 5-5)
Defenders defend forwards and pay attention to their (correct) position (correct leg in front - bent legs - grab opponent by the upper arms - stand as close to opponent as possible). Obstruct the shot/run direction - force attacker outside - communicate - help close teammates
Attackers must - determine where the spaces are - press forward and show initiative (by passing (tipping/shooting), running free (with/without the ball), playing give-and-go's. Changing/acquiring a position)
The exercise can be made easier or more difficult by: (foul play - make space in attack bigger/smaller - adjust number of players)