Dear Sir,
Thank you very much for the suggestion. I did not give practical considering the cost to users. I am motivated to give practicals after receiving your advice. I have added a practical homework below. This will be needed by the students in the next lesson and will be used to make lightning arresters at home.

E. Practical:
Make a rod or pipe earthing for your home and share the process in pictures or videos.
[Note: This earthing will be useful in my next lesson for making lightning arresters in your home.]