What I saw Julie, the English Teacher doing, jolted my memory of what I remembered learning during my early teaching years.
With young pupils, you need to inject some movement and activity into your lessons.
So, getting them to come forward is part of the technique of a good teacher. This is engaging them making the lesson come alive.
The others will not dare go to sleep knowing that at any time the teacher may call upon him or her to come forward to the board and provide some answers. Simple and brilliant ! Hey, any of you reading this think I must have forgotten my Principles of Teaching since it is more than 4 decades ago....better think again!
So...WELL DONE JULIE !