When practicing, here are things you should keep in mind:
*Have specific goal/outline playing time
*Practice in a place where you can focus/quiet spot
*Pick a specific time of day to practice each day
*Don't practice mistakes; fix them immediately
*Stop practicing when you are too tired to play or can no longer focus(10-30mins for beginners)
*Practice often/consistent (but not necessarily for a great amount of time!)
A playing/practice outline includes:
1. Warm up, check correct hand positions, bow exercises on each string, D major scale etc
2. Review songs, play through songs they've learned or the concert pieces a few times, focus on playing in tune and with correct postures. Try memorizing the songs, the more comfortable a student is with a song the less nervous they'll be when playing in a concert setting. (Idea: roll a dice for each song and the number rolled is how many time they'll practice that song.) Also, try playing with the CD accompaniment.
3. New song, play through any difficult measures first, slowly, until their fingers recognize the note patterns. Then play through the entire song a few times.
4. Discovery time, students may want to explore different sounds their instruments make, play some made up tunes or fun familiar songs.
Talk with your child about how the muscles and brain are strengthen when doing something over and over. Some times beginners just need to get past that struggling stage of learning something new before they start to see/feel the enjoyment of being able to play and instrument. Stick with it and be patient. Take the time to have your child play songs for you and be encouraging with their progress. Have rewards for practicing. Remind your child that they're part of an orchestra team and everyone needs to play their part well to have a good sounding team!
Your know your child best, find what works best for them. GOOD LUCK and THANK-YOU!
*Learning to play tips from FamilyEducation online:
Practice Tips for Elementary-School Kids