This video works well to demonstrate the point:
After watching the video, I want to make sure students understand that they can make progress every day when they practice correctly. We talked about different ways to practice a small section of music. For example:
1. Play all notes as half notes - fixing intonation
2. Practicing 1 measure at a time
3. Playing the rhythm on open strings
4. Playing open strings only to solidify string crossings
5. Playing repetitions - 10x perfect
6. Drilling eighth note passages using dotted rhythms
I divided each class by section and provided an iPad for each group to record their first try playing specific measure I selected from their music. Students were then instructed to drill and rehearse those same measures - then record themselves again to see how much they could improve after just 20 minutes of hard work. I was impressed with the diligence of the groups. They were on task and determined to make their 'after' video a success. At the end of class, we watched each groups videos and it was easy to see that there was progress made in every case. I then gave the students an option to do this assignment as extra credit over Christmas Break...just a way to keep them practicing. Most students took the assignment and they seemed excited to try this at home.