Beginner pianists can sometimes find it tricky to correlate that one step to the right on the keyboard = moving up to the next line or space on the stave…. it’s a fairly abstract concept.
Here’s a stave with light horizontal lines spaced the same distance as a standard key width (22mm). It can help to see the keys and stave notes aligned precisely (in the same way as relative rhythm cards are so useful!)
I’ve positioned it below a ‘life size’ laminated keyboard on my magnetic whiteboard.
I use it to match the same colour magnets on the keys and the stave. That’s where the dotted horizontal lines come in handy.
You could have a pupil do this- complete an ascending pattern or put a missing corresponding magnet on the correct line or space, or or the correct key.