Interesting one.
My two cents worth:
Bernoulli - Based on conservation of energy. Quantitatively simple & therefore easy to understand at a basic level. Leads to Lift = 1/2 rho x v squared, which is extremely important later on. Is not particularly accurate - eg cannot handle lift from a flat plate.
Coanda - Based on conservation of momentum. More universally applicable and easier to demonstrate (spoon under running water) than Bernoulli. Unlike Bernoulli, Coanda does explain skin friction & form drag. However, leads to mathematical complexities if the student asks "how much lift is generated?"
What about Newton's laws and Kutta - Joukowski theorem, also known as circulation theory? It's all too mathematical for my poor tired brain...
I use Bernoulli because
a) I can answer the question "how much lift at airspeed X?" and
b) it doesn't need much maths.
But then I also add to my briefs "this is just a simplification - the real world is much more complicated."
regards to all,
O8