Would getting up from your spot to read to the teacher be considered as changing the majlis?
بِسْمِ اللهِ الرَّحْمنِ الرَّحِيْم
In the name of Allah, the Most Gracious, the Most Merciful
A new sajdah will become necessary when the verse is heard in another place, a separate time, or by another person. In these cases, sajdah will need to be repeated again accordingly.
Yes, changing your sitting area from where a person studies to go and read to the teacher is another sitting and would require a new sajdah.
Al-Badai Al-Sanai Volume 1 Pg 732
Only Allah knows best
Written by Maulana Nabil Khan
Checked and approved by Mufti Mohammed Tosir Miah
Darul Ifta Birmingham