I have never heard of a school that taught to use aileron to pick up a wing when stalled. However, just to confuse everyone, flaperons stay effective for roll control even in a fully developed stall. The downside of flaperons is the huge induced drag which results in adverse yaw when at low speeds. Example you roll to the left and the nose slews right if you are not on top of it.
Then to compound the problem when you finaly manage to stall the flaperon you get roll opposite to your stick input! So if you were leading with the rudder to control yaw and you stall the flaperon you have just set youself up for a spin
Of course the only time you should get into that type of scenario is at altitude practicing slow flight where a spin wouldn't matter, or when you are a few inches off the ground when landing.