Every student had a container with an unknown liquid and a chart listing various characteristics: bubbly? foamy? translucent? transparent? viscous? The teacher tried to walk the first graders through the science lesson.
I picked up the girl I’m tutoring, who can read “Sim hit the big fig” — with help on the Sim/Sam issue — but doesn’t know what a fig is. I said it was a purple fruit, but didn’t discuss its viscosity.
When I was in first grade, I learned to distinguish a maple leaf from an oak leaf. That was pretty much the whole science curriculum until we hit fifth grade, which featured the duck-billed platypus.