Why do many violin students still struggle with intonation even after tuning carefully?

Hi everyone,

Recently I’ve been thinking a lot about how violin students actually improve their intonation between lessons.

Many students are able to tune their open strings very carefully. But once they start playing scales, shifting positions, or working on passages, the pitch can still become unstable.

A violin teacher friend once mentioned that one of the biggest challenges is what happens between lessons. During class, the teacher can immediately correct intonation, but at home students often repeat passages without really isolating pitch stability.

So I started wondering whether intonation practice should be structured more progressively. For example:

• first stabilizing single notes
• then practicing intervals
• then focusing on position accuracy
• and only later applying that stability to scales and repertoire

It seems that a lot of practice focuses on repetition rather than isolating pitch control.

I’m curious how teachers and students here approach this problem.
What exercises or methods have you found most effective for improving intonation during solo practice?

(As a side project I actually built a small tool to experiment with this idea, but I’m mostly interested in hearing how people here approach intonation training.)