Missb92,

At the morning assembly, is your face visible on a teleprompter for the 1,300 children to see? Children need to see the way you are moving your lips and tongue when you are pronouncing English words. If not, lessons specific to phonology might have to wait until class, where they can watch how your mouth is moving and practice moving their mouth muscles in the same way. Hopefully there is a teleprompter and you can ask the videographer to zoom in on your mouth/face for the lesson.