Insist… and gain
Insist at all times on describing:
Teacher: current in Something
Teacher: voltage across Something
It just does not make sense to talk about the
current across the bulb or the
voltage through the bulb.
If pupils get these the wrong way around, the chances are that they do not understand the underlying ideas.
There's value in being careful and consistent about describing things we cannot see – it's a real aid to the pupils as they try to imagine the world of currents and voltages.