Students need to know they have the teacher's attention

Hi,

"R’ Preida had a student who would only learn after R’ Preida taught him a lesson 400 times. One day, R’ Preida was asked to participate in a mitzvah [which would take place after the lesson], and he taught the student but the student could not learn. He asked, “Why is it different now?” The student replied, “From the moment I heard them tell my master that there was a mitzvah to pursue, I could not focus. At every moment I said, ‘Now the master will leave, now the master will leave.’” R’ Preida said to him, “Pay attention, and I will teach you.”"

(Talmud, Eruvin 54b)

Have a great day,
Mordechai