It is understood that student learning takes place when the material has some relevance in their lives.
All primary students have an understanding of health and being healthy.
My third grade audience was aghast when I rushed into the classroom a few minutes late with soil smeared on my clothes and face. Their immediate reaction was why was I so dirty. I explained that I had become a soil doctor. The soil had become ill. To help them understand how soils can become ill, I needed to make them see that it was actually alive.