In gradings, techniques are called randomly by a grading panel. Divide the cards into attack and defence decks. Face down they can be chosen randomly or just the techniques you want to focus on. In solo practice outside of the dojo, its a great way to 'muscle learn' techniques and then brush up on the detail with a sensei in the dojo.
The cards facilitate group practice;
- Grouping multiple defences under a single attack
- Grouping multiple attacks under a single defence.