I start with students discussing things or phenomenons happen to be seen in our surroundings or daily routine. Carefully steering their focus starting the lesson and trying to explain in very simple way such that every student either in class or if engaged individually gets the whole idea.
Now afterwards I start to give examples mentioned in lessons, from mother nature or the routine works etc.
Seeing the interest and calibre of the students carefully be going from very basics to advance level and approach.
All depends on the understanding and calibre of the students that how much focused and motivated they are yet me be trying my best to keep them on track for what I'm there with my students.