This kind of neutral 18% grey chart is a pretty nice educational tool , good to teach with :
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© Pictoraider [SHARE LINK] THIS IS A LOW QUALITY PREVIEW. Please log in to see the good quality stuff. A 50mm/1,8 EF would be convenient.
1 - Ask her set f1,8 when full aperture working period ; or set f8 if not full aperture working period,
2 - Ask her set whatever ISO sensibility she wants : 100 ISO for example, make her work exclusively with 100 ISO when you are together...Don't mention nor ask her set 200 ISO or above.
(As ISO sensibility goes from 100 to 1600 ISO, she will explore by herself when alone...Curiosity always wins.)3 - Ask her point her active center focus point to the grey part of the chart in spot-metering mode :
not on the dark part and
not on any the two white parts !!!!
(Saying that, you can be sure she does and tries when she will be alone and you not on her back...Forbiden things do have
a strong attraction ; she will with no doubt explore by herself the difference by pointing at dark part or at every white part !)4 - Ask her tweak her shutter speed so as the pointer is right in the middle of barregraph.
5 - Ask her AF focus on her main subject with the active center focus point by half-pressing the sutter button, lock the focusing by maintaining this shutter button half-pressed, recompose or not.
6 - Then tell her to take her picture by pressing fully the shutter button. That's all.
When teaching this way, you share the solid and trustful essential of photo basics and let her room to ask herself tonnes of questions and room to explore her DSLR by herself. Imho.
Hope this helps. I was a youngster myself a decade ago.