FAA theory of lift
I have always had a problem with the way lift is explained. It generally starts with Bernoulli's theorem, and the example is a Venturi (such as the throat of a carburetor). Then we are shown a wing, with the curved surface on top and a (mostly) flat surface on the bottom. We are told that this is half of a Venturi, but not told how it works, since there is no barrier for the top edge of the airflow. That's when most of us just press the PFM button and accept it. My theory, and the way it makes the most sense to me, is that the barrier (or the other surface of the half Venturi) is formed by the column of air above the surface. We know it has weight (14.7 psi at sea level, assuming a standard day), so it exerts a force on the top of the wing, and acts as a barrier. This is my rationalization of what causes lift - the Venturi effect of the atmospheric pressure acting on the top of the wing constraining the flow over the upper surface of the wing, and thus causing a reduction in pressure on the top surface in relation to the bottom surface. This also explains (to my mind, anyway) why generated lift decreases with altitude, since the weight of the column of air above the top surface of the wing decreases as altitude increases.
Just my opinion, and worth everything you paid for it.