For this method you will need an old pack of playing cards and a marker pen.
On the face of each card write the following:
- Key (ie Bb)
- Type (ie major/minor)
- Range (ie a twelth)
- Articulation (ie staccato)
Once you have done this for all your scales shuffle the cards and deal yourself 5 cards from the top of the pack. Play each of these scales correctly 3 times.