How much practice should my child do?

Little and often is the best way to learn and 5 sessions per week is ideal. For beginners and young children the session can be just 10 minutes.

As a rough guide:

Level Amount of Practice
Beginner Five sessions of 10 minutes per week
Grades 1 and 2 Five sessions of 15 to 20 minutes per week
Grades 3 and 4 Five sessions of 20 to 30 minutes per week
Grades 5 and 6 Five sessions of 30 to 40 minutes per week
Grades 7 and 8 Five sessions of 40+ minutes per week

These are very approximate times for pupils aiming to take grades where time is needed for all 4 elements of the exam.

Obviously this will vary enormously from time to time, but the grades will require approximately this amount of practice.