Motivation is the most important aspect. Every student can learn how to program. Getting started is not the hardest part, it's to keep pushing true if you feel like you don't understand anymore.
I would treat presenting like public speaking, these book recommendations from Notist are a nice way to start. Design is a Job from Mike Monteiro is a good confidence booster.
Could you answer one more question:
What's the biggest challenge for you as a teacher? Or maybe what was the biggest challenge when you had just started teaching?
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