Stick the cambered side of a standard spoon under a running tap! Ease
the cambered side of the spoon gradually into the running water until
the flow ‘sucks’ the spoon into the flow. The faster the flow of water
from the tap, the more "lift"… and the slower the flow the less "lift".
You can demo the stall by reducing the flow of water until the spoon
fails to sustain flight!!

If you want to look like more of an idiot, blow on the back of the
spoon whilst it's in the flow of water. It effectively demonstrates a
few principles of fluid dynamics… even if it isn't as scientifically
correct as it should be. You students won’t forget the demo.

OK, what is the better explanation to give fledgling students.

What's wrong with explaining both? There’s a lot of aerodynamics that
requires a fairly comprehensive knowledge of both principles?

Yes, you do have pressure differences, but that is just an artifact of
the process.

I'm not sure if I understand that sentence. Explaining 'deflection of
air' alone without reference to pressure differential essentially means
that the many reasons for a cambered wing are essentially ignored.
Explain reasons why some wings are heavily cambered and why some are
not and it qualifies your explanation.

What about a Bernoulli view of SR-71 flight ops as it climbs from
sea-level to 85,000 feet.

My point exactly. What about a SFTOL aircraft as an example of the
opposite end of the performance spectrum? Compare wings (L/D, span,
chord, etc) and compare power/thrust/weight ratios. An example of an
all-in-one wing might be an airliner with slats, slots, spoilers, and
flaps etc that effectively create a new wing for a different purpose in
different phases of flight.


--
Marty
Posted at www.flight.org