How long / how many times a week my child be practicing?

Recommended at least 4 times a week. These can be 10-20 minute practice sessions, depending on the level. 

Older beginners and teenagers should be practicing 45 minutes-60 minutes every practice session. 

Some students prefer to practice in the morning (right before school), afternoon (right after school), while dinner is being prepared, or right after dinner. 

I realize that all my students have busy lives, arranging their schedule for a consistent practice time ensures quick and efficient learning.