Teaching Lift to Seventh Graders

> With all of the debate, these days, over what actually creates lift,
> what would be good basic explainations for seventh graders.
> 

I don't think there's any real debate, unless it involves lift demons. 
The physics-based way lift works is that the wing shoves the air down. 
Make sure whatever drawings you show the kids indicates that.  A lot of 
the drawings don't.

  - ken