The second presentation  was the 'skill of stimulus variation'.It consist of the following components. Focusing,movements,gestures, voice modulation,change in interaction style,pausing and oral-visual switching.This skill actually involves the deliberate change in the stimuli presented by the teacher for the purpose of drawing , stimulating and maintaining the attention of learners throughout the class.

The topic which I have selected was "Ionic bond" and received good comments and appreciation from the teacher and observers.