What happened to engine breaking before a corner, if you’re driving to the conditions of the road, then lifting off, dropping a gear etc etc…my daughter was the same on breaking too heavily for a corner, witnessed wehn I followed her to the fuel station for the first time after giving her our cross, she’d then lost so much velocity that even the diesel was struggling to pick up momentum. I explained how to lose momentum gradually and then we went out for a few hours round the country lanes here. She was surprised how much easier it was to flow between corners and what to look out for on red/white marker posts and chevrons
There is a phrase, 'acceleration sense'. This comes from planning ahead, and releasing the accelerator in good time to reduce speed for the next hazard. This should alway sbe the first resort, with braking used if necessary. If the speed reduction requires a lower gear, then take it. But the sequence should still be speed first, then gear, whether it be brakes, or just letting go of the push. Only time to use gears to slow, is on snow or ice, unless one craves excitement.
Overbraking comes from a nervous instructor, causing their students to always approach too slowly. Our cars are much better dynamically than our nerves, so they will usually be capable of taking corners faster than the view permits. There are many roads where good views across corners are available. On these, I allow students to approach faster than ideal, just by not nagging about slowing. The resultant speed around the corner allows them to feel what too fast is like, without being near to any risk of loss of control. Keeping them below that threshold is unsafe, I feel, as they will never know actually how fast is too fast.
Another learning method I use is to approach a corner, at a safe speed. Get them to think whether the car felt safe, and if they think it could cope with more speed. Then approach the same corner 1mph faster. Repeat until the 'ooooh!' moment. Now they have something to remember and work with. Large empty car parks can be fun, but they are difficult to find.
Early on, learners tend to dance between accelerator and brake, always on one or the other. Getting them to just let go, of both, and see what happens, can be difficult. The accelerator is an infinite control, not steps, but this can be difficult to get across. A rotary volume control can be useful, as they will not turn it up a lot, then down, then up, etc., to obtain the desired volume, so then they understand the possibility of smoother accelerator control, instead of bouncing on it. I will often sit stationary, and aks them to gently increae the revs to 1500, and hold, then gently up to 2000, and hold. From there, reduce slowly to 1500 again. Difficult, but makes them work, and understand that jerky movements will not achieve the desired effect.